Merge mozilla-central to mozilla-inbound

2024-11-29 15:52:07 +00:00 · 2013-03-05 10:30:18 +00:00 · 2013-03-05 10:30:18 +00:00 · 9c7a020058
commit 9c7a020058
parent 789f89aa8f 8500dbae53
154 changed files with 2822 additions and 545 deletions
--- a/accessible/src/generic/DocAccessible.cpp
+++ b/accessible/src/generic/DocAccessible.cpp
@ -107,7 +107,9 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DocAccessible, Accessible)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mNotificationController)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mVirtualCursor)
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mChildDocuments)
+  tmp->mDependentIDsHash.EnumerateRead(CycleCollectorTraverseDepIDsEntry, &cb);
  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAccessibleCache)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAnchorJumpElm)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DocAccessible, Accessible)
@ -117,6 +119,7 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DocAccessible, Accessible)
  tmp->mDependentIDsHash.Clear();
  tmp->mNodeToAccessibleMap.Clear();
  NS_IMPL_CYCLE_COLLECTION_UNLINK(mAccessibleCache)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mAnchorJumpElm)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END

 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DocAccessible)
@ -1981,3 +1984,25 @@ DocAccessible::IsLoadEventTarget() const
  return (contentType == nsIDocShellTreeItem::typeContent);
 }

+PLDHashOperator
+DocAccessible::CycleCollectorTraverseDepIDsEntry(const nsAString& aKey,
+                                                 AttrRelProviderArray* aProviders,
+                                                 void* aUserArg)
+{
+  nsCycleCollectionTraversalCallback* cb =
+    static_cast<nsCycleCollectionTraversalCallback*>(aUserArg);
+
+  for (int32_t jdx = aProviders->Length() - 1; jdx >= 0; jdx--) {
+    NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(*cb,
+                                       "content of dependent ids hash entry of document accessible");
+
+    AttrRelProvider* provider = (*aProviders)[jdx];
+    cb->NoteXPCOMChild(provider->mContent);
+
+    NS_ASSERTION(provider->mContent->IsInDoc(),
+                 "Referred content is not in document!");
+  }
+
+  return PL_DHASH_NEXT;
+}
+
--- a/accessible/src/generic/DocAccessible.h
+++ b/accessible/src/generic/DocAccessible.h
@ -561,11 +561,19 @@ protected:
    AttrRelProvider& operator =(const AttrRelProvider&);
  };

+  typedef nsTArray<nsAutoPtr<AttrRelProvider> > AttrRelProviderArray;
+  typedef nsClassHashtable<nsStringHashKey, AttrRelProviderArray>
+    DependentIDsHashtable;
+
  /**
   * The cache of IDs pointed by relation attributes.
   */
-  typedef nsTArray<nsAutoPtr<AttrRelProvider> > AttrRelProviderArray;
-  nsClassHashtable<nsStringHashKey, AttrRelProviderArray> mDependentIDsHash;
+  DependentIDsHashtable mDependentIDsHash;
+
+  static PLDHashOperator
+    CycleCollectorTraverseDepIDsEntry(const nsAString& aKey,
+                                      AttrRelProviderArray* aProviders,
+                                      void* aUserArg);

  friend class RelatedAccIterator;

--- a/accessible/src/html/HTMLTableAccessible.cpp
+++ b/accessible/src/html/HTMLTableAccessible.cpp
@ -3,10 +3,10 @@
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

-#include "mozilla/DebugOnly.h"
-
 #include "HTMLTableAccessible.h"

+#include "mozilla/DebugOnly.h"
+
 #include "Accessible-inl.h"
 #include "nsAccessibilityService.h"
 #include "nsAccUtils.h"
@ -18,6 +18,7 @@
 #include "States.h"
 #include "TreeWalker.h"

+#include "mozilla/dom/HTMLTableElement.h"
 #include "nsIDOMElement.h"
 #include "nsIDOMDocument.h"
 #include "nsIDOMRange.h"
@ -25,10 +26,6 @@
 #include "nsINameSpaceManager.h"
 #include "nsIDOMNodeList.h"
 #include "nsIDOMHTMLCollection.h"
-#include "nsIDOMHTMLTableCellElement.h"
-#include "nsIDOMHTMLTableElement.h"
-#include "nsIDOMHTMLTableRowElement.h"
-#include "nsIDOMHTMLTableSectionElement.h"
 #include "nsIDocument.h"
 #include "nsIMutableArray.h"
 #include "nsIPresShell.h"
@ -455,7 +452,7 @@ HTMLTableAccessible::Caption()
 void
 HTMLTableAccessible::Summary(nsString& aSummary)
 {
-  nsCOMPtr<nsIDOMHTMLTableElement> table(do_QueryInterface(mContent));
+  dom::HTMLTableElement* table = dom::HTMLTableElement::FromContent(mContent);

  if (table)
    table->GetSummary(aSummary);
--- a/browser/base/content/browser-social.js
+++ b/browser/base/content/browser-social.js
@ -351,14 +351,15 @@ let SocialChatBar = {
    return !!this.chatbar.firstElementChild;
  },
  openChat: function(aProvider, aURL, aCallback, aMode) {
-    if (this.isAvailable) {
-      this.chatbar.openChat(aProvider, aURL, aCallback, aMode);
-      // We only want to focus the chat if it is as a result of user input.
-      let dwu = window.QueryInterface(Ci.nsIInterfaceRequestor)
-                      .getInterface(Ci.nsIDOMWindowUtils);
-      if (dwu.isHandlingUserInput)
-        this.chatbar.focus();
-    }
+    if (!this.isAvailable)
+      return false;
+    this.chatbar.openChat(aProvider, aURL, aCallback, aMode);
+    // We only want to focus the chat if it is as a result of user input.
+    let dwu = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                    .getInterface(Ci.nsIDOMWindowUtils);
+    if (dwu.isHandlingUserInput)
+      this.chatbar.focus();
+    return true;
  },
  update: function() {
    let command = document.getElementById("Social:FocusChat");
--- a/browser/base/content/browser.css
+++ b/browser/base/content/browser.css
@ -627,4 +627,5 @@ chatbox {
 chatbar {
  -moz-binding: url("chrome://browser/content/socialchat.xml#chatbar");
  height: 0;
+  max-height: 0;
 }
--- a/browser/base/content/test/social/browser_social_chatwindowfocus.js
+++ b/browser/base/content/test/social/browser_social_chatwindowfocus.js
@ -248,6 +248,19 @@ var tests = {
  // cause focus to move between all elements in our chat window before moving
  // to the next chat window.
  testTab: function(next) {
+    function sendTabAndWaitForFocus(chat, eltid, callback) {
+      // ideally we would use the 'focus' event here, but that doesn't work
+      // as expected for the iframe - the iframe itself never gets the focus
+      // event (apparently the sub-document etc does.)
+      // So just poll for the correct element getting focus...
+      let doc = chat.iframe.contentDocument;
+      EventUtils.sendKey("tab");
+      waitForCondition(function() {
+        let elt = eltid ? doc.getElementById(eltid) : doc.documentElement;
+        return doc.activeElement == elt;
+      }, callback, "element " + eltid + " never got focus");
+    }
+
    let chatbar = SocialChatBar.chatbar;
    startTestAndWaitForSidebar(function(port) {
      openChatViaSidebarMessage(port, {id: 1}, function() {
@ -259,22 +272,27 @@ var tests = {
          ok(isChatFocused(chat2), "new chat is focused");
          // Our chats have 3 focusable elements, so it takes 4 TABs to move
          // to the new chat.
-          EventUtils.sendKey("tab");
-          ok(isChatFocused(chat2), "new chat still focused after first tab");
-          is(chat2.iframe.contentDocument.activeElement.getAttribute("id"), "input1",
-             "first input field has focus");
-          EventUtils.sendKey("tab");
-          ok(isChatFocused(chat2), "new chat still focused after tab");
-          is(chat2.iframe.contentDocument.activeElement.getAttribute("id"), "input2",
-             "second input field has focus");
-          EventUtils.sendKey("tab");
-          ok(isChatFocused(chat2), "new chat still focused after tab");
-          is(chat2.iframe.contentDocument.activeElement.getAttribute("id"), "iframe",
-             "iframe has focus");
-          // this tab now should move to the next chat.
-          EventUtils.sendKey("tab");
-          ok(isChatFocused(chat1), "first chat is focused");
-          next();
+          sendTabAndWaitForFocus(chat2, "input1", function() {
+            is(chat2.iframe.contentDocument.activeElement.getAttribute("id"), "input1",
+               "first input field has focus");
+            ok(isChatFocused(chat2), "new chat still focused after first tab");
+            sendTabAndWaitForFocus(chat2, "input2", function() {
+              ok(isChatFocused(chat2), "new chat still focused after tab");
+              is(chat2.iframe.contentDocument.activeElement.getAttribute("id"), "input2",
+                 "second input field has focus");
+              sendTabAndWaitForFocus(chat2, "iframe", function() {
+                ok(isChatFocused(chat2), "new chat still focused after tab");
+                is(chat2.iframe.contentDocument.activeElement.getAttribute("id"), "iframe",
+                   "iframe has focus");
+                // this tab now should move to the next chat, but focus the
+                // document element itself (hence the null eltid)
+                sendTabAndWaitForFocus(chat1, null, function() {
+                  ok(isChatFocused(chat1), "first chat is focused");
+                  next();
+                });
+              });
+            });
+          });
        });
      });
    });
--- a/browser/components/migration/content/migration.js
+++ b/browser/components/migration/content/migration.js
@ -122,7 +122,7 @@ var MigrationWizard = {
      this._selectedProfile = null;
    }
    this._source = newSource;
-      
+
    // check for more than one source profile
    var sourceProfiles = this._migrator.sourceProfiles;    
    if (sourceProfiles && sourceProfiles.length > 1) {
--- a/browser/devtools/debugger/test/browser_dbg_createChrome.js
+++ b/browser/devtools/debugger/test/browser_dbg_createChrome.js
@ -11,6 +11,9 @@ var gTab = null;
 var gDebuggee = null;

 function test() {
+  // Windows XP test slaves are terribly slow at this test.
+  requestLongerTimeout(2);
+
  debug_chrome(STACK_URL, aOnClosing, function(aTab, aDebuggee, aProcess) {
    gTab = aTab;
    gDebuggee = aDebuggee;
--- a/browser/metro/base/tests/Makefile.in
+++ b/browser/metro/base/tests/Makefile.in
@ -31,7 +31,7 @@ BROWSER_TESTS = \
  $(NULL)

 BROWSER_TEST_RESOURCES = \
-  res\image01.png \
+  res/image01.png \
  $(NULL)

 libs:: $(BROWSER_TESTS)
--- a/build/automation.py.in
+++ b/build/automation.py.in
@ -474,6 +474,7 @@ user_pref("app.update.staging.enabled", false);
 user_pref("browser.panorama.experienced_first_run", true); // Assume experienced
 user_pref("dom.w3c_touch_events.enabled", 1);
 user_pref("dom.undo_manager.enabled", true);
+user_pref("dom.webcomponents.enabled", true);
 // Set a future policy version to avoid the telemetry prompt.
 user_pref("toolkit.telemetry.prompted", 999);
 user_pref("toolkit.telemetry.notifiedOptOut", 999);
--- a/build/mobile/robocop/FennecNativeActions.java.in
+++ b/build/mobile/robocop/FennecNativeActions.java.in
@ -105,6 +105,7 @@ public class FennecNativeActions implements Actions {
        private final String mGeckoEvent;
        private final Object[] mRegistrationParams;
        private boolean mEventReceived;
+        private boolean mEventEverReceived;
        private String mEventData;
        private static final int MAX_WAIT_MS = 90000;

@ -140,6 +141,7 @@ public class FennecNativeActions implements Actions {
            }
            FennecNativeDriver.log(FennecNativeDriver.LogLevel.DEBUG,
                "unblocked on expecter for " + mGeckoEvent);
+            mEventReceived = false;
        }

        public synchronized void blockUntilClear(long millis) {
@ -189,6 +191,7 @@ public class FennecNativeActions implements Actions {
            }
            FennecNativeDriver.log(FennecNativeDriver.LogLevel.DEBUG,
                "unblocked on expecter for " + mGeckoEvent);
+            mEventReceived = false;
        }

        public synchronized String blockForEventData() {
@ -197,7 +200,7 @@ public class FennecNativeActions implements Actions {
        }

        public synchronized boolean eventReceived() {
-            return mEventReceived;
+            return mEventEverReceived;
        }

        void notifyOfEvent(Object[] args) {
@ -205,6 +208,7 @@ public class FennecNativeActions implements Actions {
                "received event " + mGeckoEvent);
            synchronized (this) {
                mEventReceived = true;
+                mEventEverReceived = true;
                mEventData = args[1].toString();
                this.notifyAll();
            }
--- a/content/base/public/nsIDocument.h
+++ b/content/base/public/nsIDocument.h
@ -92,6 +92,7 @@ class DocumentFragment;
 class DocumentType;
 class DOMImplementation;
 class Element;
+struct ElementRegistrationOptions;
 class GlobalObject;
 class HTMLBodyElement;
 class Link;
@ -1910,6 +1911,10 @@ public:
  {
    return GetRootElement();
  }
+  virtual JSObject*
+  Register(JSContext* aCx, const nsAString& aName,
+           const mozilla::dom::ElementRegistrationOptions& aOptions,
+           mozilla::ErrorResult& rv) = 0;
  already_AddRefed<nsContentList>
  GetElementsByTagName(const nsAString& aTagName)
  {
--- a/content/base/public/nsINodeInfo.h
+++ b/content/base/public/nsINodeInfo.h
@ -1,4 +1,5 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
--- a/content/base/src/nsDocument.cpp
+++ b/content/base/src/nsDocument.cpp
@ -34,6 +34,7 @@
 #include "nsIDocShellTreeItem.h"
 #include "nsIScriptRuntime.h"
 #include "nsCOMArray.h"
+#include "nsDOMClassInfo.h"

 #include "nsGUIEvent.h"
 #include "nsAsyncDOMEvent.h"
@ -138,10 +139,12 @@
 #include "nsIPrompt.h"
 #include "nsIPropertyBag2.h"
 #include "nsIDOMPageTransitionEvent.h"
+#include "nsJSUtils.h"
 #include "nsFrameLoader.h"
 #include "nsEscape.h"
 #include "nsObjectLoadingContent.h"
 #include "nsHtml5TreeOpExecutor.h"
+#include "nsIDOMElementReplaceEvent.h"
 #ifdef MOZ_MEDIA
 #include "nsHTMLMediaElement.h"
 #endif // MOZ_MEDIA
@ -171,8 +174,10 @@
 #include "mozilla/dom/Comment.h"
 #include "nsTextNode.h"
 #include "mozilla/dom/Link.h"
+#include "mozilla/dom/HTMLElementBinding.h"
 #include "nsXULAppAPI.h"
 #include "nsDOMTouchEvent.h"
+#include "DictionaryHelpers.h"

 #include "mozilla/Preferences.h"

@ -183,6 +188,7 @@
 #include "nsIAppsService.h"
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/DocumentFragment.h"
+#include "mozilla/dom/WebComponentsBinding.h"
 #include "mozilla/dom/HTMLBodyElement.h"
 #include "mozilla/dom/NodeFilterBinding.h"
 #include "mozilla/dom/UndoManager.h"
@ -1372,6 +1378,13 @@ nsDocument::~nsDocument()
  mInDestructor = true;
  mInUnlinkOrDeletion = true;

+  mCustomPrototypes.Clear();
+
+  nsISupports* supports;
+  QueryInterface(NS_GET_IID(nsCycleCollectionISupports), reinterpret_cast<void**>(&supports));
+  NS_ASSERTION(supports, "Failed to QI to nsCycleCollectionISupports?!");
+  nsContentUtils::DropJSObjects(supports);
+
  // Clear mObservers to keep it in sync with the mutationobserver list
  mObservers.Clear();

@ -1478,6 +1491,7 @@ NS_INTERFACE_TABLE_HEAD(nsDocument)
    NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDOMDocumentTouch)
    NS_INTERFACE_TABLE_ENTRY(nsDocument, nsITouchEventReceiver)
    NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIInlineEventHandlers)
+    NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIDocumentRegister)
    NS_INTERFACE_TABLE_ENTRY(nsDocument, nsIObserver)
  NS_OFFSET_AND_INTERFACE_TABLE_END
  NS_OFFSET_AND_INTERFACE_TABLE_TO_MAP_SEGUE
@ -1716,7 +1730,25 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsDocument)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END


+struct CustomPrototypeTraceArgs {
+  TraceCallback callback;
+  void* closure;
+};
+
+
+static PLDHashOperator
+CustomPrototypeTrace(const nsAString& aName, JSObject* aObject, void *aArg)
+{
+  CustomPrototypeTraceArgs* traceArgs = static_cast<CustomPrototypeTraceArgs*>(aArg);
+  MOZ_ASSERT(aObject, "Protocol object value must not be null");
+  traceArgs->callback(aObject, "mCustomPrototypes entry", traceArgs->closure);
+  return PL_DHASH_NEXT;
+}
+
+
 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsDocument)
+  CustomPrototypeTraceArgs customPrototypeArgs = { aCallback, aClosure };
+  tmp->mCustomPrototypes.EnumerateRead(CustomPrototypeTrace, &customPrototypeArgs);
  nsINode::Trace(tmp, aCallback, aClosure);
 NS_IMPL_CYCLE_COLLECTION_TRACE_END

@ -1781,6 +1813,8 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsDocument)

  tmp->mIdentifierMap.Clear();

+  tmp->mCustomPrototypes.Clear();
+
  if (tmp->mAnimationController) {
    tmp->mAnimationController->Unlink();
  }
@ -1805,6 +1839,7 @@ nsDocument::Init()
  mIdentifierMap.Init();
  mStyledLinks.Init();
  mRadioGroups.Init();
+  mCustomPrototypes.Init();

  // Force initialization.
  nsINode::nsSlots* slots = Slots();
@ -1841,6 +1876,15 @@ nsDocument::Init()
  mImageTracker.Init();
  mPlugins.Init();

+  nsXPCOMCycleCollectionParticipant* participant;
+  CallQueryInterface(this, &participant);
+  NS_ASSERTION(participant, "Failed to QI to nsXPCOMCycleCollectionParticipant!");
+
+  nsISupports* thisSupports;
+  QueryInterface(NS_GET_IID(nsCycleCollectionISupports), reinterpret_cast<void**>(&thisSupports));
+  NS_ASSERTION(thisSupports, "Failed to QI to nsCycleCollectionISupports!");
+  nsContentUtils::HoldJSObjects(thisSupports, participant);
+
  return NS_OK;
 }

@ -1961,6 +2005,8 @@ nsDocument::ResetToURI(nsIURI *aURI, nsILoadGroup *aLoadGroup,
  mInUnlinkOrDeletion = oldVal;
  mCachedRootElement = nullptr;

+  mCustomPrototypes.Clear();
+
  // Reset our stylesheets
  ResetStylesheetsToURI(aURI);

@ -4845,6 +4891,205 @@ nsIDocument::CreateAttributeNS(const nsAString& aNamespaceURI,
  return attribute.forget();
 }

+static JSBool
+CustomElementConstructor(JSContext *aCx, unsigned aArgc, JS::Value* aVp)
+{
+  JS::Value calleeVal = JS_CALLEE(aCx, aVp);
+
+  JSObject* global = JS_GetGlobalForObject(aCx, &calleeVal.toObject());
+  nsCOMPtr<nsPIDOMWindow> window = do_QueryWrapper(aCx, global);
+  MOZ_ASSERT(window, "Should have a non-null window");
+
+  nsIDocument* document = window->GetDoc();
+
+  // Function name is the type of the custom element.
+  JSString* jsFunName = JS_GetFunctionId(JS_ValueToFunction(aCx, calleeVal));
+  nsDependentJSString elemName;
+  if (!elemName.init(aCx, jsFunName)) {
+    return false;
+  }
+
+  nsCOMPtr<nsIContent> newElement;
+  nsresult rv = document->CreateElem(elemName, nullptr, kNameSpaceID_XHTML,
+                                     getter_AddRefs(newElement));
+  JS::Value v;
+  rv = nsContentUtils::WrapNative(aCx, global, newElement, newElement, &v);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  JS_SET_RVAL(aCx, aVp, v);
+  return true;
+}
+
+bool
+nsDocument::RegisterEnabled()
+{
+  static bool sPrefValue =
+    Preferences::GetBool("dom.webcomponents.enabled", false);
+  return sPrefValue;
+}
+
+NS_IMETHODIMP
+nsDocument::Register(const nsAString& aName, const JS::Value& aOptions,
+                     JSContext* aCx, uint8_t aOptionalArgc,
+                     jsval* aConstructor /* out param */)
+{
+  ElementRegistrationOptions options;
+  if (aOptionalArgc > 0) {
+    JSAutoCompartment ac(aCx, GetWrapper());
+    NS_ENSURE_TRUE(JS_WrapValue(aCx, const_cast<JS::Value*>(&aOptions)),
+                   NS_ERROR_UNEXPECTED);
+    NS_ENSURE_TRUE(options.Init(aCx, nullptr, aOptions),
+                   NS_ERROR_UNEXPECTED);
+  }
+
+  ErrorResult rv;
+  JSObject* object = Register(aCx, aName, options, rv);
+  if (rv.Failed()) {
+    return rv.ErrorCode();
+  }
+  NS_ENSURE_TRUE(object, NS_ERROR_UNEXPECTED);
+
+  *aConstructor = OBJECT_TO_JSVAL(object);
+  return NS_OK;
+}
+
+JSObject*
+nsDocument::Register(JSContext* aCx, const nsAString& aName,
+                     const ElementRegistrationOptions& aOptions,
+                     ErrorResult& rv)
+{
+  nsAutoString lcName;
+  nsContentUtils::ASCIIToLower(aName, lcName);
+  if (!StringBeginsWith(lcName, NS_LITERAL_STRING("x-"))) {
+    rv.Throw(NS_ERROR_DOM_INVALID_CHARACTER_ERR);
+    return nullptr;
+  }
+  if (NS_FAILED(nsContentUtils::CheckQName(lcName, false))) {
+    rv.Throw(NS_ERROR_DOM_INVALID_CHARACTER_ERR);
+    return nullptr;
+  }
+
+  nsIScriptGlobalObject* sgo = GetScopeObject();
+  if (!sgo) {
+    rv.Throw(NS_ERROR_UNEXPECTED);
+    return nullptr;
+  }
+  JSObject* global = sgo->GetGlobalJSObject();
+
+  JSAutoCompartment ac(aCx, global);
+
+  JSObject* htmlProto = HTMLElementBinding::GetProtoObject(aCx, global);
+  if (!htmlProto) {
+    rv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    return nullptr;
+  }
+
+  JSObject* protoObject;
+  if (!aOptions.mPrototype) {
+    protoObject = JS_NewObject(aCx, NULL, htmlProto, NULL);
+    if (!protoObject) {
+      rv.Throw(NS_ERROR_UNEXPECTED);
+      return nullptr;
+    }
+  } else {
+    // If a prototype is provided, we must check to ensure that it inherits
+    // from HTMLElement.
+    protoObject = aOptions.mPrototype;
+    if (!JS_WrapObject(aCx, &protoObject)) {
+      rv.Throw(NS_ERROR_UNEXPECTED);
+      return nullptr;
+    }
+
+    // Check the proto chain for HTMLElement prototype.
+    JSObject* protoProto;
+    if (!JS_GetPrototype(aCx, protoObject, &protoProto)) {
+      rv.Throw(NS_ERROR_UNEXPECTED);
+      return nullptr;
+    }
+    while (protoProto) {
+      if (protoProto == htmlProto) {
+        break;
+      }
+      if (!JS_GetPrototype(aCx, protoProto, &protoProto)) {
+        rv.Throw(NS_ERROR_UNEXPECTED);
+        return nullptr;
+      }
+    }
+
+    if (!protoProto) {
+      rv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
+      return nullptr;
+    }
+  }
+
+  // Associate the prototype with the custom element.
+  mCustomPrototypes.Put(lcName, protoObject);
+
+  // Do element upgrade.
+  nsRefPtr<nsContentList> list = GetElementsByTagName(lcName);
+  for (int32_t i = 0; i < list->Length(false); i++) {
+    nsCOMPtr<nsINode> oldNode = list->Item(i, false);
+
+    // TODO(wchen): Perform upgrade on Shadow DOM when implemented.
+    // Bug 806506.
+    nsCOMPtr<nsINode> newNode;
+    rv = nsNodeUtils::Clone(oldNode, true, getter_AddRefs(newNode));
+    if (rv.Failed()) {
+      return nullptr;
+    }
+
+    nsINode* parentNode = oldNode->GetParentNode();
+    MOZ_ASSERT(parentNode, "Node obtained by GetElementsByTagName.");
+    nsCOMPtr<nsIDOMElement> newElement = do_QueryInterface(newNode);
+    MOZ_ASSERT(newElement, "Cloned of node obtained by GetElementsByTagName.");
+
+    parentNode->ReplaceChild(*newNode, *oldNode, rv);
+    if (rv.Failed()) {
+      return nullptr;
+    }
+
+    // Dispatch elementreplaced to replaced elements.
+    nsCOMPtr<nsIDOMEvent> event;
+    rv = CreateEvent(NS_LITERAL_STRING("elementreplace"), getter_AddRefs(event));
+    if (rv.Failed()) {
+      return nullptr;
+    }
+
+    if (aOptions.mLifecycle.mCreated) {
+      // Don't abort the upgrade algorithm if the callback throws an
+      // exception.
+      ErrorResult dummy;
+      aOptions.mLifecycle.mCreated->Call(newElement, dummy);
+    }
+
+    nsCOMPtr<nsIDOMElementReplaceEvent> ptEvent = do_QueryInterface(event);
+    MOZ_ASSERT(ptEvent);
+
+    rv = ptEvent->InitElementReplaceEvent(NS_LITERAL_STRING("elementreplace"),
+                                          false, false, newElement);
+    if (rv.Failed()) {
+      return nullptr;
+    }
+
+    event->SetTrusted(true);
+    event->SetTarget(oldNode);
+    nsEventDispatcher::DispatchDOMEvent(oldNode, nullptr, event,
+                                        nullptr, nullptr);
+  }
+
+  nsContentUtils::DispatchTrustedEvent(this, static_cast<nsIDocument*>(this),
+                                       NS_LITERAL_STRING("elementupgrade"),
+                                       true, true);
+
+  // Create constructor to return. Store the name of the custom element as the
+  // name of the function.
+  JSFunction* constructor = JS_NewFunction(aCx, CustomElementConstructor, 0,
+                                           JSFUN_CONSTRUCTOR, nullptr,
+                                           NS_ConvertUTF16toUTF8(lcName).get());
+  JSObject* constructorObject = JS_GetFunctionObject(constructor);
+  return constructorObject;
+}
+
 NS_IMETHODIMP
 nsDocument::GetElementsByTagName(const nsAString& aTagname,
                                 nsIDOMNodeList** aReturn)
@ -7427,6 +7672,8 @@ nsDocument::Destroy()
  // tearing down all those frame trees right now is the right thing to do.
  mExternalResourceMap.Shutdown();

+  mCustomPrototypes.Clear();
+
  // XXX We really should let cycle collection do this, but that currently still
  //     leaks (see https://bugzilla.mozilla.org/show_bug.cgi?id=406684).
  nsContentUtils::ReleaseWrapper(static_cast<nsINode*>(this), this);
--- a/content/base/src/nsDocument.h
+++ b/content/base/src/nsDocument.h
@ -62,6 +62,7 @@
 #include "nsIProgressEventSink.h"
 #include "nsISecurityEventSink.h"
 #include "nsIChannelEventSink.h"
+#include "nsIDocumentRegister.h"
 #include "imgIRequest.h"
 #include "mozilla/dom/DOMImplementation.h"
 #include "nsIDOMTouchEvent.h"
@ -480,6 +481,7 @@ class nsDocument : public nsIDocument,
                   public nsStubMutationObserver,
                   public nsIDOMDocumentTouch,
                   public nsIInlineEventHandlers,
+                   public nsIDocumentRegister,
                   public nsIObserver
 {
 public:
@ -779,6 +781,9 @@ public:
  // nsIInlineEventHandlers
  NS_DECL_NSIINLINEEVENTHANDLERS

+  // nsIDocumentRegister
+  NS_DECL_NSIDOCUMENTREGISTER
+
  // nsIObserver
  NS_DECL_NSIOBSERVER

@ -1013,9 +1018,22 @@ public:

  virtual nsIDOMNode* AsDOMNode() { return this; }

+  JSObject* GetCustomPrototype(const nsAString& aElementName)
+  {
+    JSObject* prototype = nullptr;
+    mCustomPrototypes.Get(aElementName, &prototype);
+    return prototype;
+  }
+
+  static bool RegisterEnabled();
+
  // WebIDL bits
  virtual mozilla::dom::DOMImplementation*
    GetImplementation(mozilla::ErrorResult& rv);
+  virtual JSObject*
+  Register(JSContext* aCx, const nsAString& aName,
+           const mozilla::dom::ElementRegistrationOptions& aOptions,
+           mozilla::ErrorResult& rv);
  virtual nsIDOMStyleSheetList* StyleSheets();
  virtual void SetSelectedStyleSheetSet(const nsAString& aSheetSet);
  virtual void GetLastStyleSheetSet(nsString& aSheetSet);
@ -1184,6 +1202,10 @@ protected:
  // non-null when this document is in fullscreen mode.
  nsWeakPtr mFullscreenRoot;

+  // Hashtable for custom element prototypes in web components.
+  // Custom prototypes are in the document's compartment.
+  nsDataHashtable<nsStringHashKey, JSObject*> mCustomPrototypes;
+
  nsRefPtr<nsEventListenerManager> mListenerManager;
  nsCOMPtr<nsIDOMStyleSheetList> mDOMStyleSheets;
  nsRefPtr<nsDOMStyleSheetSetList> mStyleSheetSetList;
--- a/content/base/src/nsINode.cpp
+++ b/content/base/src/nsINode.cpp
@ -1,5 +1,5 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=2 sw=2 et tw=79: */
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@ -2032,7 +2032,7 @@ nsINode::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const

  // Measurement of the following members may be added later if DMD finds it is
  // worthwhile:
-  // - mNodeInfo (Nb: allocated in nsNodeInfo.cpp with a nsFixedSizeAllocator)
+  // - mNodeInfo
  // - mSlots
  //
  // The following members are not measured:
--- a/content/base/src/nsNodeInfo.cpp
+++ b/content/base/src/nsNodeInfo.cpp
@ -1,4 +1,5 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@ -24,7 +25,6 @@
 #include "nsReadableUtils.h"
 #include "nsAutoPtr.h"
 #include NEW_H
-#include "nsFixedSizeAllocator.h"
 #include "prprf.h"
 #include "nsIDocument.h"
 #include "nsGkAtoms.h"
@ -32,43 +32,6 @@

 using namespace mozilla;

-static const size_t kNodeInfoPoolSizes[] = {
-  sizeof(nsNodeInfo)
-};
-
-static const int32_t kNodeInfoPoolInitialSize = sizeof(nsNodeInfo) * 64;
-
-// static
-nsFixedSizeAllocator* nsNodeInfo::sNodeInfoPool = nullptr;
-
-// static
-nsNodeInfo*
-nsNodeInfo::Create(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,
-                   uint16_t aNodeType, nsIAtom *aExtraName,
-                   nsNodeInfoManager *aOwnerManager)
-{
-  if (!sNodeInfoPool) {
-    sNodeInfoPool = new nsFixedSizeAllocator();
-    if (!sNodeInfoPool)
-      return nullptr;
-
-    nsresult rv = sNodeInfoPool->Init("NodeInfo Pool", kNodeInfoPoolSizes,
-                                      1, kNodeInfoPoolInitialSize);
-    if (NS_FAILED(rv)) {
-      delete sNodeInfoPool;
-      sNodeInfoPool = nullptr;
-      return nullptr;
-    }
-  }
-
-  // Create a new one
-  void* place = sNodeInfoPool->Alloc(sizeof(nsNodeInfo));
-  return place ?
-    new (place) nsNodeInfo(aName, aPrefix, aNamespaceID, aNodeType, aExtraName,
-                           aOwnerManager) :
-    nullptr;
-}
-
 nsNodeInfo::~nsNodeInfo()
 {
  mOwnerManager->RemoveNodeInfo(this);
@ -234,28 +197,11 @@ nsNodeInfo::NamespaceEquals(const nsAString& aNamespaceURI) const
  return nsINodeInfo::NamespaceEquals(nsid);
 }

-// static
-void
-nsNodeInfo::ClearCache()
-{
-  // Clear our cache.
-  delete sNodeInfoPool;
-  sNodeInfoPool = nullptr;
-}
-
 void
 nsNodeInfo::LastRelease()
 {
  nsRefPtr<nsNodeInfoManager> kungFuDeathGrip = mOwnerManager;
-  this->~nsNodeInfo();
-
-  // The refcount balancing and destructor re-entrancy protection
-  // code in Release() sets mRefCnt to 1 so we have to set it to 0
-  // here to prevent leaks
-  mRefCnt = 0;
-
-  NS_ASSERTION(sNodeInfoPool, "No NodeInfoPool when deleting NodeInfo!!!");
-  sNodeInfoPool->Free(this, sizeof(nsNodeInfo));
+  delete this;
 }

 bool
--- a/content/base/src/nsNodeInfo.h
+++ b/content/base/src/nsNodeInfo.h
@ -1,4 +1,5 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@ -20,8 +21,6 @@
 #include "nsIDOMNode.h"
 #include "nsGkAtoms.h"

-class nsFixedSizeAllocator;
-
 class nsNodeInfo : public nsINodeInfo
 {
 public:
@ -33,39 +32,27 @@ public:
  virtual bool NamespaceEquals(const nsAString& aNamespaceURI) const;

  // nsNodeInfo
-  // Create objects with Create
 public:
  /*
   * aName and aOwnerManager may not be null.
   */
-  static nsNodeInfo *Create(nsIAtom *aName, nsIAtom *aPrefix,
-                            int32_t aNamespaceID, uint16_t aNodeType,
-                            nsIAtom *aExtraName,
-                            nsNodeInfoManager *aOwnerManager);
-private:
-  nsNodeInfo(); // Unimplemented
-  nsNodeInfo(const nsNodeInfo& aOther); // Unimplemented
  nsNodeInfo(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,
             uint16_t aNodeType, nsIAtom *aExtraName,
             nsNodeInfoManager *aOwnerManager);
+
+private:
+  nsNodeInfo(); // Unimplemented
+  nsNodeInfo(const nsNodeInfo& aOther); // Unimplemented
 protected:
  virtual ~nsNodeInfo();

 public:
-  /**
-   * Call before shutdown to clear the cache and free memory for this class.
-   */
-  static void ClearCache();
-
  bool CanSkip();

 private:
-  static nsFixedSizeAllocator* sNodeInfoPool;
-
  /**
-   * This method gets called by Release() when it's time to delete 
-   * this object, instead of always deleting the object we'll put the
-   * object in the cache unless the cache is already full.
+   * This method gets called by Release() when it's time to delete
+   * this object.
   */
  void LastRelease();
 };
--- a/content/base/src/nsNodeInfoManager.cpp
+++ b/content/base/src/nsNodeInfoManager.cpp
@ -1,4 +1,5 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@ -220,10 +221,9 @@ nsNodeInfoManager::GetNodeInfo(nsIAtom *aName, nsIAtom *aPrefix,
  }

  nsRefPtr<nsNodeInfo> newNodeInfo =
-    nsNodeInfo::Create(aName, aPrefix, aNamespaceID, aNodeType, aExtraName,
-                       this);
+    new nsNodeInfo(aName, aPrefix, aNamespaceID, aNodeType, aExtraName, this);
  NS_ENSURE_TRUE(newNodeInfo, nullptr);
-  
+
  PLHashEntry *he;
  he = PL_HashTableAdd(mNodeInfoHash, &newNodeInfo->mInner, newNodeInfo);
  NS_ENSURE_TRUE(he, nullptr);
@ -266,13 +266,11 @@ nsNodeInfoManager::GetNodeInfo(const nsAString& aName, nsIAtom *aPrefix,
    return NS_OK;
  }

-  
  nsCOMPtr<nsIAtom> nameAtom = do_GetAtom(aName);
  NS_ENSURE_TRUE(nameAtom, NS_ERROR_OUT_OF_MEMORY);

  nsRefPtr<nsNodeInfo> newNodeInfo =
-      nsNodeInfo::Create(nameAtom, aPrefix, aNamespaceID, aNodeType, nullptr,
-                         this);
+    new nsNodeInfo(nameAtom, aPrefix, aNamespaceID, aNodeType, nullptr, this);
  NS_ENSURE_TRUE(newNodeInfo, NS_ERROR_OUT_OF_MEMORY);

  PLHashEntry *he;
--- a/content/base/src/nsNodeUtils.h
+++ b/content/base/src/nsNodeUtils.h
@ -156,6 +156,16 @@ public:
                         nullptr, aNodesWithProperties, nullptr, aResult);
  }

+  /**
+   * Clones aNode, its attributes and, if aDeep is true, its descendant nodes
+   */
+  static nsresult Clone(nsINode *aNode, bool aDeep, nsINode **aResult)
+  {
+    nsCOMArray<nsINode> dummyNodeWithProperties;
+    return CloneAndAdopt(aNode, true, aDeep, nullptr, nullptr, nullptr,
+                         dummyNodeWithProperties, aNode->GetParent(), aResult);
+  }
+
  /**
   * Walks aNode, its attributes and descendant nodes. If aNewNodeInfoManager is
   * not null, it is used to create new nodeinfos for the nodes. Also reparents
--- a/content/base/test/chrome/Makefile.in
+++ b/content/base/test/chrome/Makefile.in
@ -54,6 +54,7 @@ MOCHITEST_CHROME_FILES = \
    test_domparsing.xul \
    test_bug814638.xul \
    host_bug814638.xul \
+    test_document_register.xul \
    frame_bug814638.xul \
    $(NULL)

--- a/content/base/test/chrome/test_document_register.xul
+++ b/content/base/test/chrome/test_document_register.xul
@ -0,0 +1,37 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
+                 type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=783129
+-->
+<window title="Mozilla Bug 549682"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script type="application/javascript"
+          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=783129"
+     target="_blank">Mozilla Bug 783129</a>
+  <iframe onload="startTests()" id="fooframe" src="http://example.com"></iframe>
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+  /** Test for Bug 783129 **/
+  SimpleTest.waitForExplicitFinish();
+
+  function startTests() {
+    var c = $("fooframe").contentDocument.register("x-foo");
+    var elem = new c();
+    is(elem.tagName, "X-FOO", "Constructor should create an x-foo element.");
+
+    var anotherElem = $("fooframe").contentDocument.createElement("x-foo");
+    is(anotherElem.tagName, "X-FOO", "createElement should create an x-foo element.");
+    SimpleTest.finish();
+  }
+
+  ]]></script>
+</window>
--- a/content/canvas/src/WebGLContext.cpp
+++ b/content/canvas/src/WebGLContext.cpp
@ -564,7 +564,6 @@ WebGLContext::SetDimensions(int32_t width, int32_t height)
    // we'll end up displaying random memory
    gl->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);

-    gl->fViewport(0, 0, mWidth, mHeight);
    gl->fClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    gl->fClearDepth(1.0f);
    gl->fClearStencil(0);
--- a/content/canvas/src/WebGLContext.h
+++ b/content/canvas/src/WebGLContext.h
@ -764,6 +764,9 @@ public:
    bool ValidateUniformSetter(const char* name, WebGLUniformLocation *location_object, GLint& location);
    void ValidateProgram(WebGLProgram *prog);
    bool ValidateUniformLocation(const char* info, WebGLUniformLocation *location_object);
+    bool ValidateSamplerUniformSetter(const char* info,
+                                    WebGLUniformLocation *location,
+                                    WebGLint value);

    void VertexAttrib1f(WebGLuint index, WebGLfloat x0);
    void VertexAttrib2f(WebGLuint index, WebGLfloat x0, WebGLfloat x1);
--- a/content/canvas/src/WebGLContextGL.cpp
+++ b/content/canvas/src/WebGLContextGL.cpp
@ -2850,6 +2850,15 @@ WebGLContext::GetVertexAttrib(JSContext* cx, WebGLuint index, WebGLenum pname,
            return JS::Int32Value(mAttribBuffers[index].stride);

        case LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE:
+        {
+            if (!ValidateAttribIndex(index, "enableVertexAttribArray"))
+                return JS::NullValue();
+
+            if (!mAttribBuffers[index].enabled)
+                return JS::Int32Value(4);
+
+            // Don't break; fall through.
+        }
        case LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE:
        {
            GLint i = 0;
@ -3673,12 +3682,17 @@ WebGLContext::SurfaceFromElementResultToImageSurface(nsLayoutUtils::SurfaceFromE
 }


+
 void
 WebGLContext::Uniform1i(WebGLUniformLocation *location_object, WebGLint a1)
 {
    GLint location;
    if (!ValidateUniformSetter("Uniform1i", location_object, location))
        return;
+
+    if (!ValidateSamplerUniformSetter("Uniform1i", location_object, a1))
+        return;
+
    MakeContextCurrent();
    gl->fUniform1i(location, a1);
 }
@ -3690,6 +3704,13 @@ WebGLContext::Uniform2i(WebGLUniformLocation *location_object, WebGLint a1,
    GLint location;
    if (!ValidateUniformSetter("Uniform2i", location_object, location))
        return;
+
+    if (!ValidateSamplerUniformSetter("Uniform2i", location_object, a1) ||
+        !ValidateSamplerUniformSetter("Uniform2i", location_object, a2))
+    {
+        return;
+    }
+
    MakeContextCurrent();
    gl->fUniform2i(location, a1, a2);
 }
@ -3701,6 +3722,14 @@ WebGLContext::Uniform3i(WebGLUniformLocation *location_object, WebGLint a1,
    GLint location;
    if (!ValidateUniformSetter("Uniform3i", location_object, location))
        return;
+
+    if (!ValidateSamplerUniformSetter("Uniform3i", location_object, a1) ||
+        !ValidateSamplerUniformSetter("Uniform3i", location_object, a2) ||
+        !ValidateSamplerUniformSetter("Uniform3i", location_object, a3))
+    {
+        return;
+    }
+
    MakeContextCurrent();
    gl->fUniform3i(location, a1, a2, a3);
 }
@ -3712,6 +3741,15 @@ WebGLContext::Uniform4i(WebGLUniformLocation *location_object, WebGLint a1,
    GLint location;
    if (!ValidateUniformSetter("Uniform4i", location_object, location))
        return;
+
+    if (!ValidateSamplerUniformSetter("Uniform4i", location_object, a1) ||
+        !ValidateSamplerUniformSetter("Uniform4i", location_object, a2) ||
+        !ValidateSamplerUniformSetter("Uniform4i", location_object, a3) ||
+        !ValidateSamplerUniformSetter("Uniform4i", location_object, a4))
+    {
+        return;
+    }
+
    MakeContextCurrent();
    gl->fUniform4i(location, a1, a2, a3, a4);
 }
@ -3769,6 +3807,10 @@ WebGLContext::Uniform1iv_base(WebGLUniformLocation *location_object,
                                    numElementsToUpload, arrayLength)) {
        return;
    }
+
+    if (!ValidateSamplerUniformSetter("Uniform1iv", location_object, data[0]))
+        return;
+
    MakeContextCurrent();
    gl->fUniform1iv(location, numElementsToUpload, data);
 }
@ -3783,6 +3825,13 @@ WebGLContext::Uniform2iv_base(WebGLUniformLocation *location_object,
                                    numElementsToUpload, arrayLength)) {
        return;
    }
+
+    if (!ValidateSamplerUniformSetter("Uniform2iv", location_object, data[0]) ||
+        !ValidateSamplerUniformSetter("Uniform2iv", location_object, data[1]))
+    {
+        return;
+    }
+
    MakeContextCurrent();
    gl->fUniform2iv(location, numElementsToUpload, data);
 }
@ -3797,6 +3846,14 @@ WebGLContext::Uniform3iv_base(WebGLUniformLocation *location_object,
                                    numElementsToUpload, arrayLength)) {
        return;
    }
+
+    if (!ValidateSamplerUniformSetter("Uniform3iv", location_object, data[0]) ||
+        !ValidateSamplerUniformSetter("Uniform3iv", location_object, data[1]) ||
+        !ValidateSamplerUniformSetter("Uniform3iv", location_object, data[2]))
+    {
+        return;
+    }
+
    MakeContextCurrent();
    gl->fUniform3iv(location, numElementsToUpload, data);
 }
@ -3811,6 +3868,15 @@ WebGLContext::Uniform4iv_base(WebGLUniformLocation *location_object,
                                    numElementsToUpload, arrayLength)) {
        return;
    }
+
+    if (!ValidateSamplerUniformSetter("Uniform4iv", location_object, data[0]) ||
+        !ValidateSamplerUniformSetter("Uniform4iv", location_object, data[1]) ||
+        !ValidateSamplerUniformSetter("Uniform4iv", location_object, data[2]) ||
+        !ValidateSamplerUniformSetter("Uniform4iv", location_object, data[3]))
+    {
+        return;
+    }
+
    MakeContextCurrent();
    gl->fUniform4iv(location, numElementsToUpload, data);
 }
--- a/content/canvas/src/WebGLContextValidate.cpp
+++ b/content/canvas/src/WebGLContextValidate.cpp
@ -688,6 +688,23 @@ WebGLContext::ValidateUniformLocation(const char* info, WebGLUniformLocation *lo
    return true;
 }

+bool
+WebGLContext::ValidateSamplerUniformSetter(const char* info, WebGLUniformLocation *location, WebGLint value)
+{
+    if (location->Info().type != SH_SAMPLER_2D &&
+        location->Info().type != SH_SAMPLER_CUBE)
+    {
+        return true;
+    }
+
+    if (value >= 0 && value < mGLMaxTextureUnits)
+        return true;
+
+    ErrorInvalidValue("%s: this uniform location is a sampler, but %d is not a valid texture unit",
+                      info, value);
+    return false;
+}
+
 bool
 WebGLContext::ValidateAttribArraySetter(const char* name, uint32_t cnt, uint32_t arrayLength)
 {
--- a/content/events/src/nsEventDispatcher.cpp
+++ b/content/events/src/nsEventDispatcher.cpp
@ -866,6 +866,8 @@ nsEventDispatcher::CreateEvent(nsPresContext* aPresContext,
  if (aEventType.LowerCaseEqualsLiteral("commandevent") ||
      aEventType.LowerCaseEqualsLiteral("commandevents"))
    return NS_NewDOMCommandEvent(aDOMEvent, aPresContext, nullptr);
+  if (aEventType.LowerCaseEqualsLiteral("elementreplace"))
+    return NS_NewDOMElementReplaceEvent(aDOMEvent, aPresContext, nullptr);
  if (aEventType.LowerCaseEqualsLiteral("datacontainerevent") ||
      aEventType.LowerCaseEqualsLiteral("datacontainerevents"))
    return NS_NewDOMDataContainerEvent(aDOMEvent, aPresContext, nullptr);
--- a/content/html/content/src/HTMLAreaElement.h
+++ b/content/html/content/src/HTMLAreaElement.h
@ -155,6 +155,11 @@ public:
    SetHTMLBoolAttr(nsGkAtoms::nohref, aValue, aError);
  }

+  void Stringify(nsAString& aResult)
+  {
+    GetHref(aResult);
+  }
+
 protected:
  virtual JSObject* WrapNode(JSContext* aCx, JSObject* aScope,
                             bool* aTriedToWrap) MOZ_OVERRIDE;
--- a/content/html/content/src/HTMLTableElement.cpp
+++ b/content/html/content/src/HTMLTableElement.cpp
@ -10,6 +10,7 @@
 #include "nsAttrValueInlines.h"
 #include "nsRuleData.h"
 #include "nsHTMLStyleSheet.h"
+#include "nsMappedAttributes.h"
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/HTMLCollectionBinding.h"
 #include "mozilla/dom/HTMLTableElementBinding.h"
@ -1211,6 +1212,15 @@ HTMLTableElement::BuildInheritedAttributes()
  }
 }

+void
+HTMLTableElement::ReleaseInheritedAttributes()
+{
+  if (mTableInheritedAttributes &&
+      mTableInheritedAttributes != TABLE_ATTRS_DIRTY)
+    NS_RELEASE(mTableInheritedAttributes);
+  mTableInheritedAttributes = TABLE_ATTRS_DIRTY;
+}
+
 nsresult
 HTMLTableElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
                             nsIContent* aBindingParent,
--- a/content/html/content/src/HTMLTableElement.h
+++ b/content/html/content/src/HTMLTableElement.h
@ -9,7 +9,6 @@
 #include "nsIDOMHTMLTableElement.h"
 #include "mozilla/dom/HTMLTableCaptionElement.h"
 #include "mozilla/dom/HTMLTableSectionElement.h"
-#include "nsMappedAttributes.h"

 namespace mozilla {
 namespace dom {
@ -224,12 +223,7 @@ protected:
  // to be recalculated.
  nsMappedAttributes *mTableInheritedAttributes;
  void BuildInheritedAttributes();
-  void ReleaseInheritedAttributes() {
-    if (mTableInheritedAttributes &&
-        mTableInheritedAttributes != TABLE_ATTRS_DIRTY)
-      NS_RELEASE(mTableInheritedAttributes);
-      mTableInheritedAttributes = TABLE_ATTRS_DIRTY;
-  }
+  void ReleaseInheritedAttributes();
 };

 } // namespace dom
--- a/content/html/content/src/HTMLUnknownElement.cpp
+++ b/content/html/content/src/HTMLUnknownElement.cpp
@ -3,6 +3,7 @@
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

+#include "nsDocument.h"
 #include "HTMLUnknownElement.h"
 #include "mozilla/dom/HTMLElementBinding.h"

@ -18,7 +19,19 @@ JSObject*
 HTMLUnknownElement::WrapNode(JSContext *aCx, JSObject *aScope,
                               bool *aTriedToWrap)
 {
-  return HTMLUnknownElementBinding::Wrap(aCx, aScope, this, aTriedToWrap);
+  JSObject* obj =
+    HTMLUnknownElementBinding::Wrap(aCx, aScope, this, aTriedToWrap);
+  if (obj && Substring(NodeName(), 0, 2).LowerCaseEqualsLiteral("x-")) {
+    // If we have a registered x-tag then we fix the prototype.
+    JSAutoCompartment ac(aCx, obj);
+    nsDocument* document = static_cast<nsDocument*>(OwnerDoc());
+    JSObject* prototype = document->GetCustomPrototype(LocalName());
+    if (prototype) {
+      NS_ENSURE_TRUE(JS_WrapObject(aCx, &prototype), nullptr);
+      NS_ENSURE_TRUE(JS_SetPrototype(aCx, obj, prototype), nullptr);
+    }
+  }
+  return obj;
 }

 // QueryInterface implementation for HTMLUnknownElement
--- a/content/html/content/src/nsGenericHTMLElement.cpp
+++ b/content/html/content/src/nsGenericHTMLElement.cpp
@ -1479,8 +1479,8 @@ nsGenericHTMLElement::ParseScrollingValue(const nsAString& aString,
 * Handle attributes common to all html elements
 */
 void
-nsGenericHTMLElement::MapCommonAttributesExceptHiddenInto(const nsMappedAttributes* aAttributes,
-                                                          nsRuleData* aData)
+nsGenericHTMLElement::MapCommonAttributesInto(const nsMappedAttributes* aAttributes,
+                                              nsRuleData* aData)
 {
  if (aData->mSIDs & NS_STYLE_INHERIT_BIT(UserInterface)) {
    nsCSSValue* userModify = aData->ValueForUserModify();
@ -1508,13 +1508,6 @@ nsGenericHTMLElement::MapCommonAttributesExceptHiddenInto(const nsMappedAttribut
                                            eCSSUnit_Ident);
    }
  }
-}
-
-void
-nsGenericHTMLElement::MapCommonAttributesInto(const nsMappedAttributes* aAttributes,
-                                              nsRuleData* aData)
-{
-  nsGenericHTMLElement::MapCommonAttributesExceptHiddenInto(aAttributes, aData);

  if (aData->mSIDs & NS_STYLE_INHERIT_BIT(Display)) {
    nsCSSValue* display = aData->ValueForDisplay();
--- a/content/html/content/src/nsGenericHTMLElement.h
+++ b/content/html/content/src/nsGenericHTMLElement.h
@ -517,14 +517,6 @@ public:
  static void MapCommonAttributesInto(const nsMappedAttributes* aAttributes, 
                                      nsRuleData* aRuleData);

-  /**
-   * This method is used by embed elements because they should ignore the hidden
-   * attribute for the moment.
-   * TODO: This should be removed when bug 614825 will be fixed.
-   */
-  static void MapCommonAttributesExceptHiddenInto(const nsMappedAttributes* aAttributes,
-                                                  nsRuleData* aRuleData);
-
  static const MappedAttributeEntry sCommonAttributeMap[];
  static const MappedAttributeEntry sImageMarginSizeAttributeMap[];
  static const MappedAttributeEntry sImageBorderAttributeMap[];
--- a/content/html/content/src/nsHTMLSharedObjectElement.cpp
+++ b/content/html/content/src/nsHTMLSharedObjectElement.cpp
@ -419,21 +419,6 @@ MapAttributesIntoRule(const nsMappedAttributes *aAttributes,
  nsGenericHTMLElement::MapCommonAttributesInto(aAttributes, aData);
 }

-static void
-EmbedMapAttributesIntoRule(const nsMappedAttributes *aAttributes,
-                           nsRuleData *aData)
-{
-  // NOTE: this should call the exact some methods than MapAttributesIntoRule
-  // except that MapCommonAttributesExceptHiddenInto is called instead of
-  // MapCommonAttributesInto.
-  // TODO: This method should be removed when bug 614825 will be fixed.
-  nsGenericHTMLElement::MapImageBorderAttributeInto(aAttributes, aData);
-  nsGenericHTMLElement::MapImageMarginAttributeInto(aAttributes, aData);
-  nsGenericHTMLElement::MapImageSizeAttributesInto(aAttributes, aData);
-  nsGenericHTMLElement::MapImageAlignAttributeInto(aAttributes, aData);
-  nsGenericHTMLElement::MapCommonAttributesExceptHiddenInto(aAttributes, aData);
-}
-
 NS_IMETHODIMP_(bool)
 nsHTMLSharedObjectElement::IsAttributeMapped(const nsIAtom *aAttribute) const
 {
@ -451,10 +436,6 @@ nsHTMLSharedObjectElement::IsAttributeMapped(const nsIAtom *aAttribute) const
 nsMapRuleToAttributesFunc
 nsHTMLSharedObjectElement::GetAttributeMappingFunction() const
 {
-  if (mNodeInfo->Equals(nsGkAtoms::embed)) {
-    return &EmbedMapAttributesIntoRule;
-  }
-
  return &MapAttributesIntoRule;
 }

--- a/content/html/content/test/Makefile.in
+++ b/content/html/content/test/Makefile.in
@ -270,6 +270,7 @@ MOCHITEST_FILES = \
 		test_bug827126.html \
 		test_bug827426.html \
 		test_bug838582.html \
+		test_bug839913.html \
 		test_bug841466.html \
 		test_iframe_sandbox_inheritance.html \
 		file_iframe_sandbox_a_if1.html \
--- a/content/html/content/test/test_bug613722.html
+++ b/content/html/content/test/test_bug613722.html
@ -19,16 +19,12 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=613722

 /** Test for Bug 613722 **/

-/**
- * TODO: this test should be removed when bug 614825 will be fixed.
- */
-
 var rect = document.getElementsByTagName('embed')[0].getBoundingClientRect();

 var hasFrame = rect.left != 0 || rect.right != 0 || rect.top != 0 ||
               rect.bottom != 0;

-ok(hasFrame, "embed should have a frame with hidden set");
+ok(!hasFrame, "embed should not have a frame with hidden set");

 </script>
 </pre>
--- a/content/html/content/test/test_bug839913.html
+++ b/content/html/content/test/test_bug839913.html
@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Test for HTMLAreaElement's stringifier</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  var area = document.createElement("area");
+  area.href = "http://example.org/";
+  assert_equals(area.href, "http://example.org/");
+  assert_equals(String(area), "http://example.org/");
+}, "Area elements should stringify to the href attribute");
+</script>
--- a/content/html/document/src/nsHTMLDocument.h
+++ b/content/html/document/src/nsHTMLDocument.h
@ -9,7 +9,6 @@
 #include "nsDocument.h"
 #include "nsIHTMLDocument.h"
 #include "nsIDOMHTMLDocument.h"
-#include "nsIDOMHTMLBodyElement.h"
 #include "nsIDOMHTMLCollection.h"
 #include "nsIScriptElement.h"
 #include "jsapi.h"
--- a/content/media/AudioEventTimeline.h
+++ b/content/media/AudioEventTimeline.h
@ -18,6 +18,97 @@ namespace mozilla {

 namespace dom {

+// This is an internal helper class and should not be used outside of this header.
+struct AudioTimelineEvent {
+  enum Type MOZ_ENUM_TYPE(uint32_t) {
+    SetValue,
+    LinearRamp,
+    ExponentialRamp,
+    SetTarget,
+    SetValueCurve
+  };
+
+  AudioTimelineEvent(Type aType, double aTime, float aValue, double aTimeConstant = 0.0,
+                     float aDuration = 0.0, float* aCurve = nullptr, uint32_t aCurveLength = 0)
+    : mType(aType)
+    , mTimeConstant(aTimeConstant)
+    , mDuration(aDuration)
+#ifdef DEBUG
+    , mTimeIsInTicks(false)
+#endif
+  {
+    if (aType == AudioTimelineEvent::SetValueCurve) {
+      mCurve = aCurve;
+      mCurveLength = aCurveLength;
+    } else {
+      mValue = aValue;
+      mTime = aTime;
+    }
+  }
+
+  bool IsValid() const
+  {
+    return IsValid(mTime) &&
+           IsValid(mValue) &&
+           IsValid(mTimeConstant) &&
+           IsValid(mDuration);
+  }
+
+  template <class TimeType>
+  TimeType Time() const;
+
+  void SetTimeInTicks(int64_t aTimeInTicks)
+  {
+    mTimeInTicks = aTimeInTicks;
+#ifdef DEBUG
+    mTimeIsInTicks = true;
+#endif
+  }
+
+  Type mType;
+  union {
+    float mValue;
+    uint32_t mCurveLength;
+  };
+  union {
+    // The time for an event can either be in absolute value or in ticks.
+    // Initially the time of the event is always in absolute value.
+    // In order to convert it to ticks, call SetTimeInTicks.  Once this
+    // method has been called for an event, the time cannot be converted
+    // back to absolute value.
+    union {
+      double mTime;
+      int64_t mTimeInTicks;
+    };
+    float* mCurve;
+  };
+  double mTimeConstant;
+  double mDuration;
+#ifdef DEBUG
+  bool mTimeIsInTicks;
+#endif
+
+private:
+  static bool IsValid(double value)
+  {
+    return MOZ_DOUBLE_IS_FINITE(value);
+  }
+};
+
+template <>
+inline double AudioTimelineEvent::Time<double>() const
+{
+  MOZ_ASSERT(!mTimeIsInTicks);
+  return mTime;
+}
+
+template <>
+inline int64_t AudioTimelineEvent::Time<int64_t>() const
+{
+  MOZ_ASSERT(mTimeIsInTicks);
+  return mTimeInTicks;
+}
+
 /**
 * This class will be instantiated with different template arguments for testing and
 * production code.
@ -28,64 +119,31 @@ namespace dom {
 template <class ErrorResult>
 class AudioEventTimeline
 {
-private:
-  struct Event {
-    enum Type MOZ_ENUM_TYPE(uint32_t) {
-      SetValue,
-      LinearRamp,
-      ExponentialRamp,
-      SetTarget,
-      SetValueCurve
-    };
-
-    Event(Type aType, double aTime, float aValue, double aTimeConstant = 0.0,
-          float aDuration = 0.0, float* aCurve = nullptr, uint32_t aCurveLength = 0)
-      : mType(aType)
-      , mTimeConstant(aTimeConstant)
-      , mDuration(aDuration)
-    {
-      if (aType == Event::SetValueCurve) {
-        mCurve = aCurve;
-        mCurveLength = aCurveLength;
-      } else {
-        mValue = aValue;
-        mTime = aTime;
-      }
-    }
-
-    bool IsValid() const
-    {
-      return IsValid(mTime) &&
-             IsValid(mValue) &&
-             IsValid(mTimeConstant) &&
-             IsValid(mDuration);
-    }
-
-    Type mType;
-    union {
-      float mValue;
-      uint32_t mCurveLength;
-    };
-    union {
-      double mTime;
-      float* mCurve;
-    };
-    double mTimeConstant;
-    double mDuration;
-
-  private:
-    static bool IsValid(double value)
-    {
-      return MOZ_DOUBLE_IS_FINITE(value);
-    }
-  };
-
 public:
+  // This constructor should only be used for objects which are meant to be
+  // copied from other properly constructed objects.
+  AudioEventTimeline()
+    : mValue(0.f)
+  {
+  }
+
  explicit AudioEventTimeline(float aDefaultValue)
    : mValue(aDefaultValue)
  {
  }

+  bool HasSimpleValue() const
+  {
+    return mEvents.IsEmpty();
+  }
+
+  float GetValue() const
+  {
+    // This method should only be called if HasSimpleValue() returns true
+    MOZ_ASSERT(HasSimpleValue());
+    return mValue;
+  }
+
  float Value() const
  {
    // TODO: Return the current value based on the timeline of the AudioContext
@ -108,29 +166,29 @@ public:

  void SetValueAtTime(float aValue, double aStartTime, ErrorResult& aRv)
  {
-    InsertEvent(Event(Event::SetValue, aStartTime, aValue), aRv);
+    InsertEvent(AudioTimelineEvent(AudioTimelineEvent::SetValue, aStartTime, aValue), aRv);
  }

  void LinearRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
  {
-    InsertEvent(Event(Event::LinearRamp, aEndTime, aValue), aRv);
+    InsertEvent(AudioTimelineEvent(AudioTimelineEvent::LinearRamp, aEndTime, aValue), aRv);
  }

  void ExponentialRampToValueAtTime(float aValue, double aEndTime, ErrorResult& aRv)
  {
-    InsertEvent(Event(Event::ExponentialRamp, aEndTime, aValue), aRv);
+    InsertEvent(AudioTimelineEvent(AudioTimelineEvent::ExponentialRamp, aEndTime, aValue), aRv);
  }

  void SetTargetAtTime(float aTarget, double aStartTime, double aTimeConstant, ErrorResult& aRv)
  {
-    InsertEvent(Event(Event::SetTarget, aStartTime, aTarget, aTimeConstant), aRv);
+    InsertEvent(AudioTimelineEvent(AudioTimelineEvent::SetTarget, aStartTime, aTarget, aTimeConstant), aRv);
  }

  void SetValueCurveAtTime(const float* aValues, uint32_t aValuesLength, double aStartTime, double aDuration, ErrorResult& aRv)
  {
    // TODO: implement
    // Note that we will need to copy the buffer here.
-    // InsertEvent(Event(Event::SetValueCurve, aStartTime, 0.0f, 0.0f, aDuration, aValues, aValuesLength), aRv);
+    // InsertEvent(AudioTimelineEvent(AudioTimelineEvent::SetValueCurve, aStartTime, 0.0f, 0.0f, aDuration, aValues, aValuesLength), aRv);
  }

  void CancelScheduledValues(double aStartTime)
@ -151,33 +209,34 @@ public:
  }

  // This method computes the AudioParam value at a given time based on the event timeline
-  float GetValueAtTime(double aTime) const
+  template<class TimeType>
+  float GetValueAtTime(TimeType aTime) const
  {
-    const Event* previous = nullptr;
-    const Event* next = nullptr;
+    const AudioTimelineEvent* previous = nullptr;
+    const AudioTimelineEvent* next = nullptr;

    bool bailOut = false;
    for (unsigned i = 0; !bailOut && i < mEvents.Length(); ++i) {
      switch (mEvents[i].mType) {
-      case Event::SetValue:
-      case Event::SetTarget:
-      case Event::LinearRamp:
-      case Event::ExponentialRamp:
-        if (aTime == mEvents[i].mTime) {
+      case AudioTimelineEvent::SetValue:
+      case AudioTimelineEvent::SetTarget:
+      case AudioTimelineEvent::LinearRamp:
+      case AudioTimelineEvent::ExponentialRamp:
+        if (aTime == mEvents[i].template Time<TimeType>()) {
          // Find the last event with the same time
          do {
            ++i;
          } while (i < mEvents.Length() &&
-                   aTime == mEvents[i].mTime);
+                   aTime == mEvents[i].template Time<TimeType>());
          return mEvents[i - 1].mValue;
        }
        previous = next;
        next = &mEvents[i];
-        if (aTime < mEvents[i].mTime) {
+        if (aTime < mEvents[i].template Time<TimeType>()) {
          bailOut = true;
        }
        break;
-      case Event::SetValueCurve:
+      case AudioTimelineEvent::SetValueCurve:
        // TODO: implement
        break;
      default:
@ -198,17 +257,17 @@ public:
    // If the requested time is before all of the existing events
    if (!previous) {
      switch (next->mType) {
-      case Event::SetValue:
-      case Event::SetTarget:
+      case AudioTimelineEvent::SetValue:
+      case AudioTimelineEvent::SetTarget:
        // The requested time is before the first event
        return mValue;
-      case Event::LinearRamp:
+      case AudioTimelineEvent::LinearRamp:
        // Use t=0 as T0 and v=defaultValue as V0
-        return LinearInterpolate(0.0, mValue, next->mTime, next->mValue, aTime);
-      case Event::ExponentialRamp:
+        return LinearInterpolate(0.0, mValue, next->template Time<TimeType>(), next->mValue, aTime);
+      case AudioTimelineEvent::ExponentialRamp:
        // Use t=0 as T0 and v=defaultValue as V0
-        return ExponentialInterpolate(0.0, mValue, next->mTime, next->mValue, aTime);
-      case Event::SetValueCurve:
+        return ExponentialInterpolate(0.0, mValue, next->template Time<TimeType>(), next->mValue, aTime);
+      case AudioTimelineEvent::SetValueCurve:
        // TODO: implement
        return 0.0f;
      }
@ -216,24 +275,24 @@ public:
    }

    // SetTarget nodes can be handled no matter what their next node is (if they have one)
-    if (previous->mType == Event::SetTarget) {
+    if (previous->mType == AudioTimelineEvent::SetTarget) {
      // Follow the curve, without regard to the next node
-      return ExponentialApproach(previous->mTime, mValue, previous->mValue,
+      return ExponentialApproach(previous->template Time<TimeType>(), mValue, previous->mValue,
                                 previous->mTimeConstant, aTime);
    }

    // If the requested time is after all of the existing events
    if (!next) {
      switch (previous->mType) {
-      case Event::SetValue:
-      case Event::LinearRamp:
-      case Event::ExponentialRamp:
+      case AudioTimelineEvent::SetValue:
+      case AudioTimelineEvent::LinearRamp:
+      case AudioTimelineEvent::ExponentialRamp:
        // The value will be constant after the last event
        return previous->mValue;
-      case Event::SetValueCurve:
+      case AudioTimelineEvent::SetValueCurve:
        // TODO: implement
        return 0.0f;
-      case Event::SetTarget:
+      case AudioTimelineEvent::SetTarget:
        MOZ_ASSERT(false, "unreached");
      }
      MOZ_ASSERT(false, "unreached");
@ -243,28 +302,28 @@ public:

    // First, handle the case where our range ends up in a ramp event
    switch (next->mType) {
-    case Event::LinearRamp:
-      return LinearInterpolate(previous->mTime, previous->mValue, next->mTime, next->mValue, aTime);
-    case Event::ExponentialRamp:
-      return ExponentialInterpolate(previous->mTime, previous->mValue, next->mTime, next->mValue, aTime);
-    case Event::SetValue:
-    case Event::SetTarget:
-    case Event::SetValueCurve:
+    case AudioTimelineEvent::LinearRamp:
+      return LinearInterpolate(previous->template Time<TimeType>(), previous->mValue, next->template Time<TimeType>(), next->mValue, aTime);
+    case AudioTimelineEvent::ExponentialRamp:
+      return ExponentialInterpolate(previous->template Time<TimeType>(), previous->mValue, next->template Time<TimeType>(), next->mValue, aTime);
+    case AudioTimelineEvent::SetValue:
+    case AudioTimelineEvent::SetTarget:
+    case AudioTimelineEvent::SetValueCurve:
      break;
    }

    // Now handle all other cases
    switch (previous->mType) {
-    case Event::SetValue:
-    case Event::LinearRamp:
-    case Event::ExponentialRamp:
+    case AudioTimelineEvent::SetValue:
+    case AudioTimelineEvent::LinearRamp:
+    case AudioTimelineEvent::ExponentialRamp:
      // If the next event type is neither linear or exponential ramp, the
      // value is constant.
      return previous->mValue;
-    case Event::SetValueCurve:
+    case AudioTimelineEvent::SetValueCurve:
      // TODO: implement
      return 0.0f;
-    case Event::SetTarget:
+    case AudioTimelineEvent::SetTarget:
      MOZ_ASSERT(false, "unreached");
    }

@ -293,19 +352,26 @@ public:
    return v1 + (v0 - v1) * expf(-(t - t0) / timeConstant);
  }

-private:
-  const Event* GetPreviousEvent(double aTime) const
+  void ConvertEventTimesToTicks(int64_t (*aConvertor)(double aTime, void* aClosure), void* aClosure)
  {
-    const Event* previous = nullptr;
-    const Event* next = nullptr;
+    for (unsigned i = 0; i < mEvents.Length(); ++i) {
+      mEvents[i].SetTimeInTicks(aConvertor(mEvents[i].template Time<double>(), aClosure));
+    }
+  }
+
+private:
+  const AudioTimelineEvent* GetPreviousEvent(double aTime) const
+  {
+    const AudioTimelineEvent* previous = nullptr;
+    const AudioTimelineEvent* next = nullptr;

    bool bailOut = false;
    for (unsigned i = 0; !bailOut && i < mEvents.Length(); ++i) {
      switch (mEvents[i].mType) {
-      case Event::SetValue:
-      case Event::SetTarget:
-      case Event::LinearRamp:
-      case Event::ExponentialRamp:
+      case AudioTimelineEvent::SetValue:
+      case AudioTimelineEvent::SetTarget:
+      case AudioTimelineEvent::LinearRamp:
+      case AudioTimelineEvent::ExponentialRamp:
        if (aTime == mEvents[i].mTime) {
          // Find the last event with the same time
          do {
@ -320,7 +386,7 @@ private:
          bailOut = true;
        }
        break;
-      case Event::SetValueCurve:
+      case AudioTimelineEvent::SetValueCurve:
        // TODO: implement
        break;
      default:
@ -335,7 +401,7 @@ private:
    return previous;
  }

-  void InsertEvent(const Event& aEvent, ErrorResult& aRv)
+  void InsertEvent(const AudioTimelineEvent& aEvent, ErrorResult& aRv)
  {
    if (!aEvent.IsValid()) {
      aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
@ -345,7 +411,7 @@ private:
    // Make sure that non-curve events don't fall within the duration of a
    // curve event.
    for (unsigned i = 0; i < mEvents.Length(); ++i) {
-      if (mEvents[i].mType == Event::SetValueCurve &&
+      if (mEvents[i].mType == AudioTimelineEvent::SetValueCurve &&
          mEvents[i].mTime <= aEvent.mTime &&
          (mEvents[i].mTime + mEvents[i].mDuration) >= aEvent.mTime) {
        aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
@ -355,7 +421,7 @@ private:

    // Make sure that curve events don't fall in a range which includes other
    // events.
-    if (aEvent.mType == Event::SetValueCurve) {
+    if (aEvent.mType == AudioTimelineEvent::SetValueCurve) {
      for (unsigned i = 0; i < mEvents.Length(); ++i) {
        if (mEvents[i].mTime >= aEvent.mTime &&
            mEvents[i].mTime <= (aEvent.mTime + aEvent.mDuration)) {
@ -366,12 +432,12 @@ private:
    }

    // Make sure that invalid values are not used for exponential curves
-    if (aEvent.mType == Event::ExponentialRamp) {
+    if (aEvent.mType == AudioTimelineEvent::ExponentialRamp) {
      if (aEvent.mValue <= 0.f) {
        aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
        return;
      }
-      const Event* previousEvent = GetPreviousEvent(aEvent.mTime);
+      const AudioTimelineEvent* previousEvent = GetPreviousEvent(aEvent.mTime);
      if (previousEvent) {
        if (previousEvent->mValue <= 0.f) {
          aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
@ -418,7 +484,7 @@ private:
  // and that is the reason why we're using a simple array as the data structure.
  // We can optimize this in the future if the performance of the array ends up
  // being a bottleneck.
-  nsTArray<Event> mEvents;
+  nsTArray<AudioTimelineEvent> mEvents;
  float mValue;
 };

--- a/content/media/AudioNodeEngine.cpp
+++ b/content/media/AudioNodeEngine.cpp
@ -68,4 +68,14 @@ AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
  }
 }

+void
+AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
+                               const float aScale[WEBAUDIO_BLOCK_SIZE],
+                               float aOutput[WEBAUDIO_BLOCK_SIZE])
+{
+  for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
+    aOutput[i] = aInput[i]*aScale[i];
+  }
+}
+
 }
--- a/content/media/AudioNodeEngine.h
+++ b/content/media/AudioNodeEngine.h
@ -100,6 +100,13 @@ void AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
                                    float aScale,
                                    float aOutput[WEBAUDIO_BLOCK_SIZE]);

+/**
+ * Vector copy-scaled operation.
+ */
+void AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
+                                    const float aScale[WEBAUDIO_BLOCK_SIZE],
+                                    float aOutput[WEBAUDIO_BLOCK_SIZE]);
+
 /**
 * All methods of this class and its subclasses are called on the
 * MediaStreamGraph thread.
--- a/content/media/webaudio/GainNode.cpp
+++ b/content/media/webaudio/GainNode.cpp
@ -6,6 +6,9 @@

 #include "GainNode.h"
 #include "mozilla/dom/GainNodeBinding.h"
+#include "AudioNodeEngine.h"
+#include "AudioNodeStream.h"
+#include "AudioDestinationNode.h"

 namespace mozilla {
 namespace dom {
@ -19,10 +22,107 @@ NS_INTERFACE_MAP_END_INHERITING(AudioNode)
 NS_IMPL_ADDREF_INHERITED(GainNode, AudioNode)
 NS_IMPL_RELEASE_INHERITED(GainNode, AudioNode)

+struct ConvertTimeToTickHelper
+{
+  AudioNodeStream* mSourceStream;
+  AudioNodeStream* mDestinationStream;
+
+  static int64_t Convert(double aTime, void* aClosure)
+  {
+    TrackRate sampleRate = IdealAudioRate();
+
+    ConvertTimeToTickHelper* This = static_cast<ConvertTimeToTickHelper*> (aClosure);
+    TrackTicks tick = This->mSourceStream->GetCurrentPosition();
+    StreamTime streamTime = TicksToTimeRoundDown(sampleRate, tick);
+    GraphTime graphTime = This->mSourceStream->StreamTimeToGraphTime(streamTime);
+    StreamTime destinationStreamTime = This->mDestinationStream->GraphTimeToStreamTime(graphTime);
+    return TimeToTicksRoundDown(sampleRate, destinationStreamTime + SecondsToMediaTime(aTime));
+  }
+};
+
+class GainNodeEngine : public AudioNodeEngine
+{
+public:
+  explicit GainNodeEngine(AudioDestinationNode* aDestination)
+    : mSource(nullptr)
+    , mDestination(static_cast<AudioNodeStream*> (aDestination->Stream()))
+  {
+  }
+
+  void SetSourceStream(AudioNodeStream* aSource)
+  {
+    mSource = aSource;
+  }
+
+  enum Parameters {
+    GAIN
+  };
+  void SetTimelineParameter(uint32_t aIndex, const AudioParamTimeline& aValue) MOZ_OVERRIDE
+  {
+    switch (aIndex) {
+    case GAIN:
+      MOZ_ASSERT(mSource && mDestination);
+      mGain = aValue;
+      ConvertTimeToTickHelper ctth;
+      ctth.mSourceStream = mSource;
+      ctth.mDestinationStream = mDestination;
+      mGain.ConvertEventTimesToTicks(ConvertTimeToTickHelper::Convert, &ctth);
+      break;
+    default:
+      NS_ERROR("Bad GainNodeEngine TimelineParameter");
+    }
+  }
+
+  virtual void ProduceAudioBlock(AudioNodeStream* aStream,
+                                 const AudioChunk& aInput,
+                                 AudioChunk* aOutput,
+                                 bool* aFinished)
+  {
+    MOZ_ASSERT(mSource == aStream, "Invalid source stream");
+
+    *aOutput = aInput;
+    if (mGain.HasSimpleValue()) {
+      // Optimize the case where we only have a single value set as the volume
+      aOutput->mVolume *= mGain.GetValue();
+    } else {
+      // First, compute a vector of gains for each track tick based on the
+      // timeline at hand, and then for each channel, multiply the values
+      // in the buffer with the gain vector.
+
+      // Compute the gain values for the duration of the input AudioChunk
+      // XXX we need to add a method to AudioEventTimeline to compute this buffer directly.
+      float computedGain[WEBAUDIO_BLOCK_SIZE];
+      for (size_t counter = 0; counter < WEBAUDIO_BLOCK_SIZE; ++counter) {
+        TrackTicks tick = aStream->GetCurrentPosition() + counter;
+        computedGain[counter] = mGain.GetValueAtTime<TrackTicks>(tick);
+      }
+
+      // Apply the gain to the output buffer
+      for (size_t channel = 0; channel < aOutput->mChannelData.Length(); ++channel) {
+        float* buffer = static_cast<float*> (const_cast<void*>
+                          (aOutput->mChannelData[channel]));
+        AudioBlockCopyChannelWithScale(buffer, computedGain, buffer);
+      }
+    }
+  }
+
+  AudioNodeStream* mSource;
+  AudioNodeStream* mDestination;
+  AudioParamTimeline mGain;
+};
+
 GainNode::GainNode(AudioContext* aContext)
  : AudioNode(aContext)
-  , mGain(new AudioParam(this, Callback, 1.0f, 0.0f, 1.0f))
+  , mGain(new AudioParam(this, SendGainToStream, 1.0f, 0.0f, 1.0f))
 {
+  GainNodeEngine* engine = new GainNodeEngine(aContext->Destination());
+  mStream = aContext->Graph()->CreateAudioNodeStream(engine);
+  engine->SetSourceStream(static_cast<AudioNodeStream*> (mStream.get()));
+}
+
+GainNode::~GainNode()
+{
+  DestroyMediaStream();
 }

 JSObject*
@ -31,6 +131,14 @@ GainNode::WrapObject(JSContext* aCx, JSObject* aScope)
  return GainNodeBinding::Wrap(aCx, aScope, this);
 }

+void
+GainNode::SendGainToStream(AudioNode* aNode)
+{
+  GainNode* This = static_cast<GainNode*>(aNode);
+  AudioNodeStream* ns = static_cast<AudioNodeStream*>(This->mStream.get());
+  ns->SetTimelineParameter(GainNodeEngine::GAIN, *This->mGain);
+}
+
 }
 }

--- a/content/media/webaudio/GainNode.h
+++ b/content/media/webaudio/GainNode.h
@ -19,6 +19,7 @@ class GainNode : public AudioNode
 {
 public:
  explicit GainNode(AudioContext* aContext);
+  virtual ~GainNode();

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(GainNode, AudioNode)
@ -30,6 +31,14 @@ public:
    return mGain;
  }

+  virtual bool SupportsMediaStreams() const MOZ_OVERRIDE
+  {
+    return true;
+  }
+
+private:
+  static void SendGainToStream(AudioNode* aNode);
+
 private:
  nsRefPtr<AudioParam> mGain;
 };
--- a/content/media/webaudio/MediaBufferDecoder.cpp
+++ b/content/media/webaudio/MediaBufferDecoder.cpp
@ -868,8 +868,10 @@ WebAudioDecodeJob::OnFailure(ErrorCode aErrorCode)

  // Ignore errors in calling the callback, since there is not much that we can
  // do about it here.
-  ErrorResult rv;
-  mFailureCallback->Call(rv);
+  if (mFailureCallback) {
+    ErrorResult rv;
+    mFailureCallback->Call(rv);
+  }

  mContext->RemoveFromDecodeQueue(this);
 }
--- a/content/media/webaudio/compiledtest/TestAudioEventTimeline.cpp
+++ b/content/media/webaudio/compiledtest/TestAudioEventTimeline.cpp
@ -91,14 +91,14 @@ void TestSpecExample()
  ErrorResultMock rv;

  // This test is copied from the example in the Web Audio spec
-  const float t0 = 0.0,
-              t1 = 0.1,
-              t2 = 0.2,
-              t3 = 0.3,
-              t4 = 0.4,
-              t5 = 0.6,
-              t6 = 0.7/*,
-              t7 = 1.0*/;
+  const double t0 = 0.0,
+               t1 = 0.1,
+               t2 = 0.2,
+               t3 = 0.3,
+               t4 = 0.4,
+               t5 = 0.6,
+               t6 = 0.7/*,
+               t7 = 1.0*/;
  timeline.SetValueAtTime(0.2f, t0, rv);
  is(rv, NS_OK, "SetValueAtTime succeeded");
  timeline.SetValueAtTime(0.3f, t1, rv);
@ -115,22 +115,22 @@ void TestSpecExample()
  is(rv, NS_OK, "ExponentialRampToValueAtTime succeeded");
  // TODO: Add the SetValueCurveAtTime test

-  is(timeline.GetValueAtTime(0.0f), 0.2f, "Correct value");
-  is(timeline.GetValueAtTime(0.05f), 0.2f, "Correct value");
-  is(timeline.GetValueAtTime(0.1f), 0.3f, "Correct value");
-  is(timeline.GetValueAtTime(0.15f), 0.3f, "Correct value");
-  is(timeline.GetValueAtTime(0.2f), 0.4f, "Correct value");
-  is(timeline.GetValueAtTime(0.25f), (0.4f + 1.0f) / 2, "Correct value");
-  is(timeline.GetValueAtTime(0.3f), 1.0f, "Correct value");
-  is(timeline.GetValueAtTime(0.35f), (1.0f + 0.15f) / 2, "Correct value");
-  is(timeline.GetValueAtTime(0.4f), 0.15f, "Correct value");
-  is(timeline.GetValueAtTime(0.45f), (0.15f * powf(0.75f / 0.15f, 0.05f / 0.2f)), "Correct value");
-  is(timeline.GetValueAtTime(0.5f), (0.15f * powf(0.75f / 0.15f, 0.5f)), "Correct value");
-  is(timeline.GetValueAtTime(0.55f), (0.15f * powf(0.75f / 0.15f, 0.15f / 0.2f)), "Correct value");
-  is(timeline.GetValueAtTime(0.6f), 0.75f, "Correct value");
-  is(timeline.GetValueAtTime(0.65f), (0.75f * powf(0.05 / 0.75f, 0.5f)), "Correct value");
-  is(timeline.GetValueAtTime(0.7f), 0.05f, "Correct value");
-  is(timeline.GetValueAtTime(1.0f), 0.05f, "Correct value");
+  is(timeline.GetValueAtTime(0.0), 0.2f, "Correct value");
+  is(timeline.GetValueAtTime(0.05), 0.2f, "Correct value");
+  is(timeline.GetValueAtTime(0.1), 0.3f, "Correct value");
+  is(timeline.GetValueAtTime(0.15), 0.3f, "Correct value");
+  is(timeline.GetValueAtTime(0.2), 0.4f, "Correct value");
+  is(timeline.GetValueAtTime(0.25), (0.4f + 1.0f) / 2, "Correct value");
+  is(timeline.GetValueAtTime(0.3), 1.0f, "Correct value");
+  is(timeline.GetValueAtTime(0.35), (1.0f + 0.15f) / 2, "Correct value");
+  is(timeline.GetValueAtTime(0.4), 0.15f, "Correct value");
+  is(timeline.GetValueAtTime(0.45), (0.15f * powf(0.75f / 0.15f, 0.05f / 0.2f)), "Correct value");
+  is(timeline.GetValueAtTime(0.5), (0.15f * powf(0.75f / 0.15f, 0.5f)), "Correct value");
+  is(timeline.GetValueAtTime(0.55), (0.15f * powf(0.75f / 0.15f, 0.15f / 0.2f)), "Correct value");
+  is(timeline.GetValueAtTime(0.6), 0.75f, "Correct value");
+  is(timeline.GetValueAtTime(0.65), (0.75f * powf(0.05 / 0.75f, 0.5f)), "Correct value");
+  is(timeline.GetValueAtTime(0.7), 0.05f, "Correct value");
+  is(timeline.GetValueAtTime(1.0), 0.05f, "Correct value");
 }

 void TestInvalidEvents()
@ -189,11 +189,11 @@ void TestEventReplacement()
  timeline.SetValueAtTime(20.0f, 0.1, rv);
  is(rv, NS_OK, "Event scheduling should be successful");
  is(timeline.GetEventCount(), 1u, "Event should be replaced");
-  is(timeline.GetValueAtTime(0.1f), 20.0f, "The first event should be overwritten");
+  is(timeline.GetValueAtTime(0.1), 20.0f, "The first event should be overwritten");
  timeline.LinearRampToValueAtTime(30.0f, 0.1, rv);
  is(rv, NS_OK, "Event scheduling should be successful");
  is(timeline.GetEventCount(), 2u, "Different event type should be appended");
-  is(timeline.GetValueAtTime(0.1f), 30.0f, "The first event should be overwritten");
+  is(timeline.GetValueAtTime(0.1), 30.0f, "The first event should be overwritten");
 }

 void TestEventRemoval()
@ -222,7 +222,7 @@ void TestBeforeFirstEvent()
  ErrorResultMock rv;

  timeline.SetValueAtTime(20.0f, 1.0, rv);
-  is(timeline.GetValueAtTime(0.5f), 10.0f, "Retrun the default value before the first event");
+  is(timeline.GetValueAtTime(0.5), 10.0f, "Retrun the default value before the first event");
 }

 void TestAfterLastValueEvent()
@ -232,7 +232,7 @@ void TestAfterLastValueEvent()
  ErrorResultMock rv;

  timeline.SetValueAtTime(20.0f, 1.0, rv);
-  is(timeline.GetValueAtTime(1.5f), 20.0f, "Return the last value after the last SetValue event");
+  is(timeline.GetValueAtTime(1.5), 20.0f, "Return the last value after the last SetValue event");
 }

 void TestAfterLastTargetValueEvent()
@ -242,7 +242,7 @@ void TestAfterLastTargetValueEvent()
  ErrorResultMock rv;

  timeline.SetTargetAtTime(20.0f, 1.0, 5.0, rv);
-  is(timeline.GetValueAtTime(10.f), (20.f + (10.f - 20.f) * expf(-9.0f / 5.0f)), "Return the value after the last SetTarget event based on the curve");
+  is(timeline.GetValueAtTime(10.), (20.f + (10.f - 20.f) * expf(-9.0f / 5.0f)), "Return the value after the last SetTarget event based on the curve");
 }

 void TestAfterLastTargetValueEventWithValueSet()
@ -253,7 +253,7 @@ void TestAfterLastTargetValueEventWithValueSet()

  timeline.SetValue(50.f);
  timeline.SetTargetAtTime(20.0f, 1.0, 5.0, rv);
-  is(timeline.GetValueAtTime(10.f), (20.f + (50.f - 20.f) * expf(-9.0f / 5.0f)), "Return the value after SetValue and the last SetTarget event based on the curve");
+  is(timeline.GetValueAtTime(10.), (20.f + (50.f - 20.f) * expf(-9.0f / 5.0f)), "Return the value after SetValue and the last SetTarget event based on the curve");
 }

 void TestValue()
@ -279,7 +279,7 @@ void TestLinearRampAtZero()
  ErrorResultMock rv;

  timeline.LinearRampToValueAtTime(20.0f, 0.0, rv);
-  is(timeline.GetValueAtTime(0.0f), 20.0f, "Should get the correct value when t0 == t1 == 0");
+  is(timeline.GetValueAtTime(0.0), 20.0f, "Should get the correct value when t0 == t1 == 0");
 }

 void TestExponentialRampAtZero()
@ -289,7 +289,7 @@ void TestExponentialRampAtZero()
  ErrorResultMock rv;

  timeline.ExponentialRampToValueAtTime(20.0f, 0.0, rv);
-  is(timeline.GetValueAtTime(0.0f), 20.0f, "Should get the correct value when t0 == t1 == 0");
+  is(timeline.GetValueAtTime(0.0), 20.0f, "Should get the correct value when t0 == t1 == 0");
 }

 void TestLinearRampAtSameTime()
@ -300,7 +300,7 @@ void TestLinearRampAtSameTime()

  timeline.SetValueAtTime(5.0f, 1.0, rv);
  timeline.LinearRampToValueAtTime(20.0f, 1.0, rv);
-  is(timeline.GetValueAtTime(1.0f), 20.0f, "Should get the correct value when t0 == t1");
+  is(timeline.GetValueAtTime(1.0), 20.0f, "Should get the correct value when t0 == t1");
 }

 void TestExponentialRampAtSameTime()
@ -311,7 +311,7 @@ void TestExponentialRampAtSameTime()

  timeline.SetValueAtTime(5.0f, 1.0, rv);
  timeline.ExponentialRampToValueAtTime(20.0f, 1.0, rv);
-  is(timeline.GetValueAtTime(1.0f), 20.0f, "Should get the correct value when t0 == t1");
+  is(timeline.GetValueAtTime(1.0), 20.0f, "Should get the correct value when t0 == t1");
 }

 void TestSetTargetZeroTimeConstant()
@ -321,7 +321,7 @@ void TestSetTargetZeroTimeConstant()
  ErrorResultMock rv;

  timeline.SetTargetAtTime(20.0f, 1.0, 0.0, rv);
-  is(timeline.GetValueAtTime(10.f), 20.f, "Should get the correct value with timeConstant == 0");
+  is(timeline.GetValueAtTime(10.), 20.f, "Should get the correct value with timeConstant == 0");
 }

 void TestExponentialInvalidPreviousZeroValue()
--- a/content/media/webaudio/test/Makefile.in
+++ b/content/media/webaudio/test/Makefile.in
@ -15,6 +15,7 @@ MOCHITEST_FILES := \
  test_bug808374.html \
  test_bug827541.html \
  test_bug839753.html \
+  test_bug845960.html \
  test_AudioBuffer.html \
  test_AudioContext.html \
  test_AudioListener.html \
--- a/content/media/webaudio/test/test_bug845960.html
+++ b/content/media/webaudio/test/test_bug845960.html
@ -0,0 +1,20 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Crashtest for bug 845960</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SpecialPowers.setBoolPref("media.webaudio.enabled", true);
+(new AudioContext()).decodeAudioData(new ArrayBuffer(0), function() {});
+ok(true, "Should not crash when the optional failure callback is not specified");
+SpecialPowers.clearUserPref("media.webaudio.enabled");
+
+</script>
+</pre>
+</body>
+</html>
--- a/content/xul/templates/src/nsContentSupportMap.h
+++ b/content/xul/templates/src/nsContentSupportMap.h
@ -7,7 +7,6 @@
 #define nsContentSupportMap_h__

 #include "pldhash.h"
-#include "nsFixedSizeAllocator.h"
 #include "nsTemplateMatch.h"

 /**
--- a/content/xul/templates/src/nsContentTestNode.h
+++ b/content/xul/templates/src/nsContentTestNode.h
@ -8,7 +8,6 @@

 #include "nscore.h"
 #include "nsRuleNetwork.h"
-#include "nsFixedSizeAllocator.h"
 #include "nsIAtom.h"
 #include "nsIDOMDocument.h"

--- a/content/xul/templates/src/nsRDFConInstanceTestNode.h
+++ b/content/xul/templates/src/nsRDFConInstanceTestNode.h
@ -7,7 +7,6 @@
 #define nsRDFConInstanceTestNode_h__

 #include "nscore.h"
-#include "nsFixedSizeAllocator.h"
 #include "nsRDFTestNode.h"
 #include "nsIRDFResource.h"
 #include "nsIRDFDataSource.h"
--- a/content/xul/templates/src/nsXULTemplateQueryProcessorRDF.h
+++ b/content/xul/templates/src/nsXULTemplateQueryProcessorRDF.h
@ -18,7 +18,6 @@
 #include "nsICollation.h"
 #include "nsCollationCID.h"

-#include "nsFixedSizeAllocator.h"
 #include "nsResourceSet.h"
 #include "nsRuleNetwork.h"
 #include "nsRDFQuery.h"
--- a/content/xul/templates/src/nsXULTemplateResultSetRDF.h
+++ b/content/xul/templates/src/nsXULTemplateResultSetRDF.h
@ -6,7 +6,6 @@
 #ifndef nsXULTemplateResultSetRDF_h__
 #define nsXULTemplateResultSetRDF_h__

-#include "nsFixedSizeAllocator.h"
 #include "nsISimpleEnumerator.h"
 #include "nsRuleNetwork.h"
 #include "nsRDFQuery.h"
--- a/dom/base/nsDOMClassInfo.cpp
+++ b/dom/base/nsDOMClassInfo.cpp
@ -2044,6 +2044,8 @@ nsDOMClassInfo::Init()

  DOM_CLASSINFO_MAP_BEGIN(HTMLDocument, nsIDOMHTMLDocument)
    DOM_CLASSINFO_MAP_ENTRY(nsIDOMHTMLDocument)
+    DOM_CLASSINFO_MAP_CONDITIONAL_ENTRY(nsIDocumentRegister,
+                                        nsDocument::RegisterEnabled())
    DOM_CLASSINFO_DOCUMENT_MAP_ENTRIES
  DOM_CLASSINFO_MAP_END

--- a/dom/bindings/BindingUtils.h
+++ b/dom/bindings/BindingUtils.h
@ -696,6 +696,15 @@ GetWrapperCache(void* p)
  return NULL;
 }

+// Helper template for smart pointers to resolve ambiguity between
+// GetWrappeCache(void*) and GetWrapperCache(const ParentObject&).
+template <template <typename> class SmartPtr, typename T>
+inline nsWrapperCache*
+GetWrapperCache(const SmartPtr<T>& aObject)
+{
+  return GetWrapperCache(aObject.get());
+}
+
 /**
 * A method to handle new-binding wrap failure, by possibly falling back to
 * wrapping as a non-new-binding object.
--- a/dom/file/ArchiveZipFile.h
+++ b/dom/file/ArchiveZipFile.h
@ -59,8 +59,8 @@ public:
  // Overrides:
  NS_IMETHOD GetInternalStream(nsIInputStream**);

-  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
-  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(ArchiveZipFile, nsIDOMFile)
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ArchiveZipFile, nsDOMFileCC)

 protected:
  virtual already_AddRefed<nsIDOMBlob> CreateSlice(uint64_t aStart,
--- a/dom/indexedDB/IndexedDatabaseManager.cpp
+++ b/dom/indexedDB/IndexedDatabaseManager.cpp
@ -418,6 +418,11 @@ IndexedDatabaseManager::GetOrCreate()
    nsCOMPtr<nsIObserverService> obs = GetObserverService();
    NS_ENSURE_TRUE(obs, nullptr);

+    // Must initialize the storage service on the main thread.
+    nsCOMPtr<mozIStorageService> ss =
+      do_GetService(MOZ_STORAGE_SERVICE_CONTRACTID);
+    NS_ENSURE_TRUE(ss, nullptr);
+
    // We need this callback to know when to shut down all our threads.
    rv = obs->AddObserver(instance, PROFILE_BEFORE_CHANGE_OBSERVER_ID, false);
    NS_ENSURE_SUCCESS(rv, nullptr);
--- a/dom/interfaces/core/Makefile.in
+++ b/dom/interfaces/core/Makefile.in
@ -29,6 +29,7 @@ SDK_XPIDLSRCS =                                 \
 	nsIDOMNodeList.idl			\
 	nsIDOMProcessingInstruction.idl		\
 	nsIDOMText.idl				\
+	nsIDocumentRegister.idl		\
 	$(NULL)
 XPIDLSRCS =                                     \
 	nsIDOMDOMStringList.idl			\
--- a/dom/interfaces/core/nsIDocumentRegister.idl
+++ b/dom/interfaces/core/nsIDocumentRegister.idl
@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+[scriptable, uuid(e35935bd-ebae-4e0d-93bf-efa93ab14c05)]
+interface nsIDocumentRegister : nsISupports
+{
+  [optional_argc,
+   implicit_jscontext] jsval   register(in DOMString name,
+                                        [optional] in jsval options)
+                                 raises(DOMException);
+};
+
--- a/dom/interfaces/events/Makefile.in
+++ b/dom/interfaces/events/Makefile.in
@ -48,6 +48,7 @@ XPIDLSRCS =					\
 	nsIDOMUserProximityEvent.idl            \
 	nsIDOMDeviceOrientationEvent.idl        \
 	nsIDOMDeviceMotionEvent.idl		\
+	nsIDOMElementReplaceEvent.idl		\
 	nsIDOMScrollAreaEvent.idl		\
 	nsIDOMTransitionEvent.idl		\
 	nsIDOMAnimationEvent.idl		\
--- a/dom/interfaces/events/nsIDOMElementReplaceEvent.idl
+++ b/dom/interfaces/events/nsIDOMElementReplaceEvent.idl
@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIDOMEvent.idl"
+
+interface nsIDOMElement;
+
+[scriptable, builtinclass, uuid(19a31767-54bf-4044-8769-cd172e37eca2)]
+interface nsIDOMElementReplaceEvent : nsIDOMEvent
+{
+  readonly attribute nsIDOMElement upgrade;
+
+  void initElementReplaceEvent(in DOMString typeArg,
+                               in boolean canBubbleArg,
+                               in boolean canCancelArg,
+                               in nsIDOMElement upgrade);
+};
+
+dictionary ElementReplaceEventInit : EventInit
+{
+  nsIDOMElement upgrade;
+};
--- a/dom/system/gonk/ril_worker.js
+++ b/dom/system/gonk/ril_worker.js
@ -10315,7 +10315,7 @@ let ICCRecordHelper = {
   * @param onerror      Callback to be called when error.
   */
  readEmail: function readEmail(fileId, fileType, recordNumber, onsuccess, onerror) {
-    function callback(optoins) {
+    function callback(options) {
      let strLen = Buf.readUint32();
      let octetLen = strLen / 2;
      let email = null;
@ -10362,7 +10362,7 @@ let ICCRecordHelper = {
   * @param onerror      Callback to be called when error.
   */
  readANR: function readANR(fileId, fileType, recordNumber, onsuccess, onerror) {
-    function callback(optoins) {
+    function callback(options) {
      let strLen = Buf.readUint32();
      let octetLen = strLen / 2;
      let number = null;
--- a/dom/tests/mochitest/general/test_interfaces.html
+++ b/dom/tests/mochitest/general/test_interfaces.html
@ -64,6 +64,7 @@ var interfaceNamesInGlobalScope =
    "HTMLOptionElement",
    "Pkcs11",
    "NotifyAudioAvailableEvent",
+    "ElementReplaceEvent",
    "Array",
    "SVGZoomAndPan",
    "XULPopupElement",
--- a/dom/tests/mochitest/moz.build
+++ b/dom/tests/mochitest/moz.build
@ -21,6 +21,7 @@ DIRS += [
    'storageevent',
    'pointerlock',
    'webapps',
+    'webcomponents',
 ]

 #needs IPC support, also tests do not run successfully in Firefox for now
--- a/dom/tests/mochitest/webcomponents/Makefile.in
+++ b/dom/tests/mochitest/webcomponents/Makefile.in
@ -0,0 +1,18 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+DEPTH		= @DEPTH@
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+relativesrcdir	= @relativesrcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MOCHITEST_FILES	= \
+		test_document_register.html \
+		test_document_register_lifecycle.html \
+		$(NULL)
+
+include $(topsrcdir)/config/rules.mk
--- a/dom/tests/mochitest/webcomponents/moz.build
+++ b/dom/tests/mochitest/webcomponents/moz.build
@ -0,0 +1,5 @@
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
--- a/dom/tests/mochitest/webcomponents/test_document_register.html
+++ b/dom/tests/mochitest/webcomponents/test_document_register.html
@ -0,0 +1,90 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=783129
+-->
+<head>
+  <title>Test for document.register using custom prototype</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+
+<script>
+var gElementUpgraded = false;
+var gElementReplaced = false;
+
+function elementUpgrade() {
+  gElementUpgraded = true;
+
+  // Check for prototype on upgraded element.
+  var documentElement = document.getElementById("grabme");
+  ok(documentElement.hello, "Upgraded element should inherit 'hello' method from prototype.");
+  documentElement.hello();
+
+  var customChild = document.getElementById("kid");
+  ok(customChild, "Upgrade should preserve children.");
+  ok(customChild.parentNode == documentElement, "Parent should be updated to new custom element.");
+
+  // Try creating new element and checking for prototype.
+  var constructedElement = document.createElement("x-hello");
+  ok(constructedElement.hello, "Created element should inherit 'hello' method from prototype.");
+  constructedElement.hello();
+}
+
+function elementReplace(e) {
+  gElementReplaced = true;
+
+  ok(e.upgrade != e.target, "Upgraded element should be different from the target.");
+  ok(e.upgrade.firstElementChild.id == "kid", "Upgrade element should have a child.");
+  ok(e.target.firstElementChild.id == "kid", "Replacement element should have a child.");
+}
+
+function startTest() {
+  // Create a prototype that inheits from HTMLElement.
+  var customProto = {};
+  customProto.__proto__ = HTMLElement.prototype;
+  customProto.hello = function() {
+    ok(true, "Custom element should use provided prototype.");
+  };
+
+  var oldElem = document.getElementById("grabme");
+  oldElem.addEventListener("elementreplace", elementReplace);
+
+  document.addEventListener("elementupgrade", elementUpgrade);
+  var elementConstructor = document.register("x-hello", { prototype: customProto });
+
+  // Try creating new element and checking for prototype.
+  var constructedElement = new elementConstructor();
+  ok(constructedElement.hello, "Created element should inherit 'hello' method from prototype.");
+  constructedElement.hello();
+
+  ok(!oldElem.hello, "Element obtained prior to registration should not have inherited prototype.");
+
+  ok(gElementUpgraded && gElementReplaced, "Upgrade and replace events should have been fired.");
+
+  // Check that custom elements registered without a prototype inherit from HTMLElement.
+  document.register("x-bye");
+  var byeElement = document.createElement("x-bye");
+  ok(byeElement.__proto__.__proto__, HTMLElement.prototype, "Element registered without prototype should inherit from HTMLElement.");
+
+  // Check that element registration with a prototype that does not inherit from HTMLElement results in exception.
+  try {
+    document.register("x-foo", { "prototype": {} });
+    ok(false, "Prototype that does not inherit from HTMLElement should throw exception");
+  } catch (ex) {
+    ok(true, "Prototype that does not inherit from HTMLElement should throw exception");
+  }
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+
+</head>
+<body onload="startTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=783129">Bug 783129</a>
+<x-hello id="grabme">
+<div id="kid"></div>
+</x-hello>
+</body>
+</html>
--- a/dom/tests/mochitest/webcomponents/test_document_register_lifecycle.html
+++ b/dom/tests/mochitest/webcomponents/test_document_register_lifecycle.html
@ -0,0 +1,49 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=783129
+-->
+<head>
+  <title>Test for document.register lifecycle callback</title>
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+
+<script>
+
+var gLifecycleCallbackCalled = false;
+
+var lifecycleCallbacks = {
+  created: function() {
+    is(this.getAttribute("id"), "grabme", "|this| value should be the upgrade element");
+    gLifecycleCallbackCalled = true;
+  }
+};
+
+function startTest() {
+  var HtmlProto = function() {};
+  HtmlProto.prototype = HTMLElement.prototype;
+
+  // Create a prototype that inheits from HTMLElement.
+  var customProto = new HtmlProto();
+  customProto.hello = function() {
+    ok(true, "Custom element should use provided prototype.");
+  };
+
+  var elementConstructor = document.register("x-hello", { prototype: customProto, lifecycle: lifecycleCallbacks });
+
+  ok(gLifecycleCallbackCalled, "Lifecycle callback should be called.");
+
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+</script>
+
+</head>
+<body onload="startTest()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=783129">Bug 783129</a>
+<x-hello id="grabme">
+<div id="kid"></div>
+</x-hello>
+</body>
+</html>
--- a/dom/webidl/Document.webidl
+++ b/dom/webidl/Document.webidl
@ -228,6 +228,12 @@ partial interface Document {
    void mozExitPointerLock ();
 };

+//http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html#dfn-document-register
+partial interface Document {
+    [Throws, Pref="dom.webcomponents.enabled"]
+    object register(DOMString name, optional ElementRegistrationOptions options);
+};
+
 // http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/PageVisibility/Overview.html#sec-document-interface
 partial interface Document {
  readonly attribute boolean hidden;
--- a/dom/webidl/HTMLAreaElement.webidl
+++ b/dom/webidl/HTMLAreaElement.webidl
@ -20,8 +20,12 @@ interface HTMLAreaElement : HTMLElement {
           attribute DOMString coords;
           [SetterThrows]
           attribute DOMString shape;
+  // No support for stringifier attributes yet
+  //[SetterThrows]
+  //stringifier attribute DOMString href;
+  stringifier;
           [SetterThrows]
-  stringifier attribute DOMString href;
+           attribute DOMString href;
           [SetterThrows]
           attribute DOMString target;
           [SetterThrows]
--- a/dom/webidl/WebComponents.webidl
+++ b/dom/webidl/WebComponents.webidl
@ -0,0 +1,24 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface DocumentFragment;
+
+callback LifecycleCreatedCallback = void();
+
+dictionary LifecycleCallbacks {
+  LifecycleCreatedCallback? created = null;
+};
+
+dictionary ElementRegistrationOptions {
+  object? prototype = null;
+  LifecycleCallbacks lifecycle;
+};
+
--- a/dom/webidl/WebIDL.mk
+++ b/dom/webidl/WebIDL.mk
@ -217,6 +217,7 @@ webidl_files = \
  TreeWalker.webidl \
  URL.webidl \
  ValidityState.webidl \
+  WebComponents.webidl \
  WebSocket.webidl \
  UndoManager.webidl \
  URLUtils.webidl \
--- a/editor/libeditor/html/nsHTMLDataTransfer.cpp
+++ b/editor/libeditor/html/nsHTMLDataTransfer.cpp
@ -39,7 +39,6 @@
 #include "nsIDOMDocumentFragment.h"
 #include "nsIDOMElement.h"
 #include "nsIDOMHTMLAnchorElement.h"
-#include "nsIDOMHTMLBodyElement.h"
 #include "nsIDOMHTMLEmbedElement.h"
 #include "nsIDOMHTMLFrameElement.h"
 #include "nsIDOMHTMLIFrameElement.h"
@ -48,9 +47,6 @@
 #include "nsIDOMHTMLLinkElement.h"
 #include "nsIDOMHTMLObjectElement.h"
 #include "nsIDOMHTMLScriptElement.h"
-#include "nsIDOMHTMLTableCellElement.h"
-#include "nsIDOMHTMLTableElement.h"
-#include "nsIDOMHTMLTableRowElement.h"
 #include "nsIDOMNode.h"
 #include "nsIDOMRange.h"
 #include "nsIDocument.h"
@ -737,30 +733,24 @@ nsHTMLEditor::GetAttributeToModifyOnNode(nsIDOMNode *aNode, nsAString &aAttr)
  }

  NS_NAMED_LITERAL_STRING(bgStr, "background");
-  nsCOMPtr<nsIDOMHTMLBodyElement> nodeAsBody = do_QueryInterface(aNode);
-  if (nodeAsBody)
-  {
+  nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
+  if (element && element->IsHTML(nsGkAtoms::body)) {
    aAttr = bgStr;
    return NS_OK;
  }

-  nsCOMPtr<nsIDOMHTMLTableElement> nodeAsTable = do_QueryInterface(aNode);
-  if (nodeAsTable)
-  {
+  if (element && element->IsHTML(nsGkAtoms::table)) {
    aAttr = bgStr;
    return NS_OK;
  }

-  nsCOMPtr<nsIDOMHTMLTableRowElement> nodeAsTableRow = do_QueryInterface(aNode);
-  if (nodeAsTableRow)
-  {
+  if (element && element->IsHTML(nsGkAtoms::tr)) {
    aAttr = bgStr;
    return NS_OK;
  }

-  nsCOMPtr<nsIDOMHTMLTableCellElement> nodeAsTableCell = do_QueryInterface(aNode);
-  if (nodeAsTableCell)
-  {
+  if (element &&
+      (element->IsHTML(nsGkAtoms::td) || element->IsHTML(nsGkAtoms::th))) {
    aAttr = bgStr;
    return NS_OK;
  }
--- a/embedding/components/webbrowserpersist/src/nsWebBrowserPersist.cpp
+++ b/embedding/components/webbrowserpersist/src/nsWebBrowserPersist.cpp
@ -55,10 +55,6 @@

 #include "nsIDOMNodeFilter.h"
 #include "nsIDOMProcessingInstruction.h"
-#include "nsIDOMHTMLBodyElement.h"
-#include "nsIDOMHTMLTableElement.h"
-#include "nsIDOMHTMLTableRowElement.h"
-#include "nsIDOMHTMLTableCellElement.h"
 #include "nsIDOMHTMLAnchorElement.h"
 #include "nsIDOMHTMLAreaElement.h"
 #include "nsIDOMHTMLImageElement.h"
@ -2734,30 +2730,22 @@ nsresult nsWebBrowserPersist::OnWalkDOMNode(nsIDOMNode *aNode)
    }
 #endif // MOZ_MEDIA

-    nsCOMPtr<nsIDOMHTMLBodyElement> nodeAsBody = do_QueryInterface(aNode);
-    if (nodeAsBody)
-    {
+    if (content->IsHTML(nsGkAtoms::body)) {
        StoreURIAttribute(aNode, "background");
        return NS_OK;
    }

-    nsCOMPtr<nsIDOMHTMLTableElement> nodeAsTable = do_QueryInterface(aNode);
-    if (nodeAsTable)
-    {
+    if (content->IsHTML(nsGkAtoms::table)) {
        StoreURIAttribute(aNode, "background");
        return NS_OK;
    }

-    nsCOMPtr<nsIDOMHTMLTableRowElement> nodeAsTableRow = do_QueryInterface(aNode);
-    if (nodeAsTableRow)
-    {
+    if (content->IsHTML(nsGkAtoms::tr)) {
        StoreURIAttribute(aNode, "background");
        return NS_OK;
    }

-    nsCOMPtr<nsIDOMHTMLTableCellElement> nodeAsTableCell = do_QueryInterface(aNode);
-    if (nodeAsTableCell)
-    {
+    if (content->IsHTML(nsGkAtoms::td) || content->IsHTML(nsGkAtoms::th)) {
        StoreURIAttribute(aNode, "background");
        return NS_OK;
    }
@ -3024,9 +3012,7 @@ nsWebBrowserPersist::CloneNodeWithFixedUpAttributes(
        return rv;
    }

-    nsCOMPtr<nsIDOMHTMLBodyElement> nodeAsBody = do_QueryInterface(aNodeIn);
-    if (nodeAsBody)
-    {
+    if (content->IsHTML(nsGkAtoms::body)) {
        rv = GetNodeToFixup(aNodeIn, aNodeOut);
        if (NS_SUCCEEDED(rv) && *aNodeOut)
        {
@ -3035,9 +3021,7 @@ nsWebBrowserPersist::CloneNodeWithFixedUpAttributes(
        return rv;
    }

-    nsCOMPtr<nsIDOMHTMLTableElement> nodeAsTable = do_QueryInterface(aNodeIn);
-    if (nodeAsTable)
-    {
+    if (content->IsHTML(nsGkAtoms::table)) {
        rv = GetNodeToFixup(aNodeIn, aNodeOut);
        if (NS_SUCCEEDED(rv) && *aNodeOut)
        {
@ -3046,9 +3030,7 @@ nsWebBrowserPersist::CloneNodeWithFixedUpAttributes(
        return rv;
    }

-    nsCOMPtr<nsIDOMHTMLTableRowElement> nodeAsTableRow = do_QueryInterface(aNodeIn);
-    if (nodeAsTableRow)
-    {
+    if (content->IsHTML(nsGkAtoms::tr)) {
        rv = GetNodeToFixup(aNodeIn, aNodeOut);
        if (NS_SUCCEEDED(rv) && *aNodeOut)
        {
@ -3057,9 +3039,7 @@ nsWebBrowserPersist::CloneNodeWithFixedUpAttributes(
        return rv;
    }

-    nsCOMPtr<nsIDOMHTMLTableCellElement> nodeAsTableCell = do_QueryInterface(aNodeIn);
-    if (nodeAsTableCell)
-    {
+    if (content->IsHTML(nsGkAtoms::td) || content->IsHTML(nsGkAtoms::th)) {
        rv = GetNodeToFixup(aNodeIn, aNodeOut);
        if (NS_SUCCEEDED(rv) && *aNodeOut)
        {
--- a/gfx/gl/GLContext.cpp
+++ b/gfx/gl/GLContext.cpp
@ -574,7 +574,7 @@ GLContext::InitWithPrefix(const char *prefix, bool trygl)
        }

        // We're ready for final setup.
-        InitFramebuffers();
+        fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);

        if (mCaps.any)
            DetermineCaps();
--- a/gfx/gl/GLContext.h
+++ b/gfx/gl/GLContext.h
@ -606,11 +606,6 @@ public:
        return ret;
    }

-    void InitFramebuffers() {
-        MakeCurrent();
-        BindFB(0);
-    }
-
 private:
    void GetShaderPrecisionFormatNonES2(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision) {
        switch (precisiontype) {
@ -1173,7 +1168,10 @@ public:
        if (!CreateScreenBuffer(size, caps))
            return false;

-        InitFramebuffers();
+        MakeCurrent();
+        fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
+        fScissor(0, 0, size.width, size.height);
+        fViewport(0, 0, size.width, size.height);

        mCaps = mScreen->Caps();
        UpdateGLFormats(caps);
--- a/gfx/gl/GLContextProviderCGL.mm
+++ b/gfx/gl/GLContextProviderCGL.mm
@ -113,7 +113,6 @@ public:
        if (!InitWithPrefix("gl", true))
            return false;

-        InitFramebuffers();
        return true;
    }

--- a/gfx/gl/GLContextProviderEGL.cpp
+++ b/gfx/gl/GLContextProviderEGL.cpp
@ -348,8 +348,8 @@ public:
        }

        SetupLookupFunction();
-
-        bool ok = InitWithPrefix("gl", true);
+        if (!InitWithPrefix("gl", true))
+            return false;

        PR_STATIC_ASSERT(sizeof(GLint) >= sizeof(int32_t));
        mMaxTextureImageSize = INT32_MAX;
@ -358,10 +358,7 @@ public:
                             sEGLLibrary.HasKHRImageTexture2D() &&
                             IsExtensionSupported(OES_EGL_image);

-        if (ok)
-            InitFramebuffers();
-
-        return ok;
+        return true;
    }

    bool IsDoubleBuffered() {
--- a/gfx/gl/GLContextProviderGLX.cpp
+++ b/gfx/gl/GLContextProviderGLX.cpp
@ -864,8 +864,6 @@ TRY_AGAIN_NO_SHARING:
        if (!IsExtensionSupported(EXT_framebuffer_object))
            return false;

-        InitFramebuffers();
-
        return true;
    }

--- a/gfx/gl/GLContextProviderWGL.cpp
+++ b/gfx/gl/GLContextProviderWGL.cpp
@ -319,7 +319,6 @@ public:
        if (!InitWithPrefix("gl", true))
            return false;

-        InitFramebuffers();
        return true;
    }

--- a/js/src/gc/Marking.h
+++ b/js/src/gc/Marking.h
@ -109,6 +109,13 @@ DeclMarker(TypeObject, types::TypeObject)

 #undef DeclMarker

+/* Return true if the pointer is NULL, or if it is a tagged pointer to NULL. */
+JS_ALWAYS_INLINE bool
+IsNullTaggedPointer(void *p)
+{
+    return uintptr_t(p) < 32;
+}
+
 /*** Externally Typed Marking ***/

 /*
--- a/js/src/gc/RootMarking.cpp
+++ b/js/src/gc/RootMarking.cpp
@ -46,7 +46,7 @@ static inline void
 MarkExactStackRoot(JSTracer *trc, Rooted<void*> *rooter, ThingRootKind kind)
 {
    void **addr = (void **)rooter->address();
-    if (!*addr)
+    if (IsNullTaggedPointer(*addr))
        return;

    if (kind == THING_ROOT_OBJECT && *addr == Proxy::LazyProto)
--- a/js/src/jit-test/tests/basic/bug839313.js
+++ b/js/src/jit-test/tests/basic/bug839313.js
@ -0,0 +1,3 @@
+// Bug 839313: Verify that 'it' does not leave JS_AddValueRoot roots lying around.
+var dbg = new Debugger;
+it.customNative = assertEq;
--- a/js/src/jsinterpinlines.h
+++ b/js/src/jsinterpinlines.h
@ -1121,7 +1121,9 @@ class FastInvokeGuard
    RootedFunction fun_;
    RootedScript script_;
 #ifdef JS_ION
-    ion::IonContext ictx_;
+    // Constructing an IonContext is pretty expensive due to the TLS access,
+    // so only do this if we have to.
+    mozilla::Maybe<ion::IonContext> ictx_;
    bool useIon_;
 #endif

@ -1130,7 +1132,6 @@ class FastInvokeGuard
      : fun_(cx)
      , script_(cx)
 #ifdef JS_ION
-      , ictx_(cx, cx->compartment, NULL)
      , useIon_(ion::IsEnabled(cx))
 #endif
    {
@ -1155,6 +1156,8 @@ class FastInvokeGuard
    bool invoke(JSContext *cx) {
 #ifdef JS_ION
        if (useIon_ && fun_) {
+            if (ictx_.empty())
+                ictx_.construct(cx, cx->compartment, (js::ion::TempAllocator *)NULL);
            JS_ASSERT(fun_->nonLazyScript() == script_);

            ion::MethodStatus status = ion::CanEnterUsingFastInvoke(cx, script_, args_.length());
--- a/js/src/vm/ObjectImpl-inl.h
+++ b/js/src/vm/ObjectImpl-inl.h
@ -359,7 +359,7 @@ js::ObjectImpl::writeBarrierPre(ObjectImpl *obj)
     * This would normally be a null test, but TypeScript::global uses 0x1 as a
     * special value.
     */
-    if (uintptr_t(obj) < 32)
+    if (IsNullTaggedPointer(obj))
        return;

    Zone *zone = obj->zone();
@ -376,7 +376,7 @@ js::ObjectImpl::writeBarrierPre(ObjectImpl *obj)
 js::ObjectImpl::writeBarrierPost(ObjectImpl *obj, void *addr)
 {
 #ifdef JSGC_GENERATIONAL
-    if (uintptr_t(obj) < 32)
+    if (IsNullTaggedPointer(obj))
        return;
    obj->runtime()->gcStoreBuffer.putCell((Cell **)addr);
 #endif
--- a/js/xpconnect/src/event_impl_gen.conf.in
+++ b/js/xpconnect/src/event_impl_gen.conf.in
@ -39,6 +39,7 @@ simple_events = [
    'MozVoicemailEvent',
    'USSDReceivedEvent',
 #endif
+    'ElementReplaceEvent',
    'MozSmsEvent',
    'DeviceStorageChangeEvent',
    'PopupBlockedEvent',
--- a/layout/base/nsCSSFrameConstructor.cpp
+++ b/layout/base/nsCSSFrameConstructor.cpp
@ -30,8 +30,6 @@
 #include "nsTableColGroupFrame.h"
 #include "nsTableColFrame.h"
 #include "nsIDOMHTMLDocument.h"
-#include "nsIDOMHTMLTableColElement.h"
-#include "nsIDOMHTMLTableCaptionElem.h"
 #include "nsHTMLParts.h"
 #include "nsIPresShell.h"
 #include "nsUnicharUtils.h"
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@ -5512,6 +5512,12 @@ PresShell::Paint(nsView*        aViewToPaint,
    aViewToPaint->GetWidget()->GetLayerManager(&isRetainingManager);
  NS_ASSERTION(layerManager, "Must be in paint event");

+  if (!layerManager) {
+    // Crash so we get a good stack on how this code is getting triggered.
+    // See bug 847002 for details.
+    MOZ_CRASH();
+  }
+
  // Whether or not we should set first paint when painting is
  // suppressed is debatable. For now we'll do it because
  // B2G relies on first paint to configure the viewport and
--- a/layout/base/tests/test_bug93077-6.html
+++ b/layout/base/tests/test_bug93077-6.html
@ -20,11 +20,6 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=93077
 <p><a name=TOP>Top</a></p>
 <pre id="test">
 <script type="application/javascript">
-
-if (navigator.platform.startsWith("Linux")) {
-  SimpleTest.expectAssertions(0, 2); // bug 846096
-}
-
 /** Test for Bug 93077 **/
 ["#top", "#Top"].forEach(function(fragid) {
  document.getElementById("below").scrollIntoView()
--- a/layout/base/tests/test_mozPaintCount.html
+++ b/layout/base/tests/test_mozPaintCount.html
@ -16,10 +16,6 @@
 <pre id="test">
 <script class="testbody" type="text/javascript">

-if (!navigator.platform.startsWith("Win")) {
-  SimpleTest.expectAssertions(0, 2); // bug 846096
-}
-
 SimpleTest.waitForExplicitFinish();

 var startPaintCount = window.mozPaintCount;
--- a/layout/base/tests/test_reftests_with_caret.html
+++ b/layout/base/tests/test_reftests_with_caret.html
@ -14,10 +14,6 @@
  </style>
 <script type="text/javascript">

-if (!navigator.platform.startsWith("Win")) {
-  SimpleTest.expectAssertions(0, 2); // bug 846096
-}
-
 SimpleTest.waitForExplicitFinish();

 var canvases = [];
--- a/layout/base/tests/test_remote_frame.html
+++ b/layout/base/tests/test_remote_frame.html
@ -20,10 +20,6 @@
  <script type="application/javascript;version=1.7">
    "use strict";

-    if (!navigator.platform.startsWith("Win")) {
-      SimpleTest.expectAssertions(0, 2); // bug 846096
-    }
-
    var referenceSnapshot;
    var iterations = 0;

--- a/layout/base/tests/test_scroll_selection_into_view.html
+++ b/layout/base/tests/test_scroll_selection_into_view.html
@ -67,10 +67,6 @@
 <pre id="test">
 <script class="testbody" type="text/javascript">

-if (navigator.platform.startsWith("Mac")) {
-  SimpleTest.expectAssertions(0, 2); // bug 846096
-}
-
 var ANCHOR = 0;
 var FOCUS = 1;

--- a/layout/build/nsLayoutStatics.cpp
+++ b/layout/build/nsLayoutStatics.cpp
@ -330,7 +330,6 @@ nsLayoutStatics::Shutdown()

  nsAttrValue::Shutdown();
  nsContentUtils::Shutdown();
-  nsNodeInfo::ClearCache();
  nsLayoutStylesheetCache::Shutdown();
  NS_NameSpaceManagerShutdown();

--- a/layout/generic/nsBlockFrame.cpp
+++ b/layout/generic/nsBlockFrame.cpp
@ -63,7 +63,6 @@
 #include "nsBidiPresUtils.h"
 #endif // IBMBIDI

-#include "nsIDOMHTMLBodyElement.h"
 #include "nsIDOMHTMLHtmlElement.h"

 static const int MIN_LINES_NEEDING_CURSOR = 20;
--- a/layout/generic/nsBlockReflowContext.cpp
+++ b/layout/generic/nsBlockReflowContext.cpp
@ -16,8 +16,6 @@
 #include "nsContainerFrame.h"
 #include "nsBlockFrame.h"
 #include "nsLineBox.h"
-#include "nsIDOMHTMLTableCellElement.h"
-#include "nsIDOMHTMLBodyElement.h"
 #include "nsGkAtoms.h"
 #include "nsCOMPtr.h"
 #include "nsLayoutUtils.h"
--- a/layout/tables/nsTableCellFrame.cpp
+++ b/layout/tables/nsTableCellFrame.cpp
@ -20,7 +20,6 @@
 #include "nsGkAtoms.h"
 #include "nsIPresShell.h"
 #include "nsCOMPtr.h"
-#include "nsIDOMHTMLTableCellElement.h"
 #include "nsIServiceManager.h"
 #include "nsIDOMNode.h"
 #include "nsINameSpaceManager.h"
--- a/layout/tables/nsTableColFrame.cpp
+++ b/layout/tables/nsTableColFrame.cpp
@ -12,7 +12,6 @@
 #include "nsGkAtoms.h"
 #include "nsCSSRendering.h"
 #include "nsIContent.h"
-#include "nsIDOMHTMLTableColElement.h"

 #define COL_TYPE_BITS                 (NS_FRAME_STATE_BIT(28) | \
                                       NS_FRAME_STATE_BIT(29) | \
--- a/layout/tables/nsTableColGroupFrame.cpp
+++ b/layout/tables/nsTableColGroupFrame.cpp
@ -5,7 +5,6 @@
 #include "nsTableColGroupFrame.h"
 #include "nsTableColFrame.h"
 #include "nsTableFrame.h"
-#include "nsIDOMHTMLTableColElement.h"
 #include "nsStyleContext.h"
 #include "nsStyleConsts.h"
 #include "nsPresContext.h"
--- a/layout/tables/nsTableFrame.cpp
+++ b/layout/tables/nsTableFrame.cpp
@ -33,7 +33,6 @@
 #include "nsIPresShell.h"
 #include "nsIDOMElement.h"
 #include "nsIDOMHTMLElement.h"
-#include "nsIDOMHTMLBodyElement.h"
 #include "nsFrameManager.h"
 #include "nsError.h"
 #include "nsAutoPtr.h"
--- a/media/mtransport/build/Makefile.in
+++ b/media/mtransport/build/Makefile.in
@ -31,6 +31,7 @@ EXPORTS_mtransport = \
  ../dtlsidentity.h \
  ../nricectx.h \
  ../nricemediastream.h \
+  ../nriceresolverfake.h \
  ../transportflow.h \
  ../transportlayer.h \
  ../transportlayerdtls.h \
--- a/Show More
+++ b/Show More