gecko-dev/dom/base/nsObjectLoadingContent.h
Kyle Machulis 2f8387c6cb Bug 1398071 - Rewrite youtube embeds that use enablejsapi; r=cpeterson
Youtube has now deprecated flash embeds completely, meaning
enablejsapi in embeds will no longer work. We can now rewrite these to
use HTML5, as any functionality related to the js api will no
longer function anyways.

MozReview-Commit-ID: kZTwpyLaYw

--HG--
extra : rebase_source : 7b6516183a4c7de8fe47fb328e4f28f3ad7bc03f
2017-09-08 12:59:52 -07:00

733 lines
28 KiB
C++

/* -*- 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 base class implementing nsIObjectLoadingContent for use by
* various content nodes that want to provide plugin/document/image
* loading functionality (eg <embed>, <object>, etc).
*/
#ifndef NSOBJECTLOADINGCONTENT_H_
#define NSOBJECTLOADINGCONTENT_H_
#include "mozilla/Attributes.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "nsImageLoadingContent.h"
#include "nsIStreamListener.h"
#include "nsIChannelEventSink.h"
#include "nsIContentPolicy.h"
#include "nsIObjectLoadingContent.h"
#include "nsIRunnable.h"
#include "nsIThreadInternal.h"
#include "nsIFrame.h"
#include "nsIFrameLoader.h"
class nsAsyncInstantiateEvent;
class nsStopPluginRunnable;
class AutoSetInstantiatingToFalse;
class nsIPrincipal;
class nsFrameLoader;
class nsPluginFrame;
class nsXULElement;
class nsPluginInstanceOwner;
namespace mozilla {
namespace dom {
template<typename T> class Sequence;
struct MozPluginParameter;
class HTMLIFrameElement;
} // namespace dom
} // namespace mozilla
class nsObjectLoadingContent : public nsImageLoadingContent
, public nsIStreamListener
, public nsIFrameLoaderOwner
, public nsIObjectLoadingContent
, public nsIChannelEventSink
{
friend class AutoSetInstantiatingToFalse;
friend class AutoSetLoadingToFalse;
friend class CheckPluginStopEvent;
friend class nsStopPluginRunnable;
friend class nsAsyncInstantiateEvent;
public:
// This enum's values must be the same as the constants on
// nsIObjectLoadingContent
enum ObjectType {
// Loading, type not yet known. We may be waiting for a channel to open.
eType_Loading = TYPE_LOADING,
// Content is a *non-svg* image
eType_Image = TYPE_IMAGE,
// Content is a plugin
eType_Plugin = TYPE_PLUGIN,
// Content is a fake plugin, which loads as a document but behaves as a
// plugin (see nsPluginHost::CreateFakePlugin)
eType_FakePlugin = TYPE_FAKE_PLUGIN,
// Content is a subdocument, possibly SVG
eType_Document = TYPE_DOCUMENT,
// No content loaded (fallback). May be showing alternate content or
// a custom error handler - *including* click-to-play dialogs
eType_Null = TYPE_NULL
};
enum FallbackType {
// The content type is not supported (e.g. plugin not installed)
eFallbackUnsupported = nsIObjectLoadingContent::PLUGIN_UNSUPPORTED,
// Showing alternate content
eFallbackAlternate = nsIObjectLoadingContent::PLUGIN_ALTERNATE,
// The plugin exists, but is disabled
eFallbackDisabled = nsIObjectLoadingContent::PLUGIN_DISABLED,
// The plugin is blocklisted and disabled
eFallbackBlocklisted = nsIObjectLoadingContent::PLUGIN_BLOCKLISTED,
// The plugin is considered outdated, but not disabled
eFallbackOutdated = nsIObjectLoadingContent::PLUGIN_OUTDATED,
// The plugin has crashed
eFallbackCrashed = nsIObjectLoadingContent::PLUGIN_CRASHED,
// Suppressed by security policy
eFallbackSuppressed = nsIObjectLoadingContent::PLUGIN_SUPPRESSED,
// Blocked by content policy
eFallbackUserDisabled = nsIObjectLoadingContent::PLUGIN_USER_DISABLED,
/// ** All values >= eFallbackClickToPlay are plugin placeholder types
/// that would be replaced by a real plugin if activated (PlayPlugin())
/// ** Furthermore, values >= eFallbackClickToPlay and
/// <= eFallbackVulnerableNoUpdate are click-to-play types.
// The plugin is disabled until the user clicks on it
eFallbackClickToPlay = nsIObjectLoadingContent::PLUGIN_CLICK_TO_PLAY,
// The plugin is vulnerable (update available)
eFallbackVulnerableUpdatable = nsIObjectLoadingContent::PLUGIN_VULNERABLE_UPDATABLE,
// The plugin is vulnerable (no update available)
eFallbackVulnerableNoUpdate = nsIObjectLoadingContent::PLUGIN_VULNERABLE_NO_UPDATE,
};
nsObjectLoadingContent();
virtual ~nsObjectLoadingContent();
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSIFRAMELOADEROWNER
NS_DECL_NSIOBJECTLOADINGCONTENT
NS_DECL_NSICHANNELEVENTSINK
/**
* Object state. This is a bitmask of NS_EVENT_STATEs epresenting the
* current state of the object.
*/
mozilla::EventStates ObjectState() const;
ObjectType Type() const { return mType; }
void SetIsNetworkCreated(bool aNetworkCreated)
{
mNetworkCreated = aNetworkCreated;
}
/**
* When the object is loaded, the attributes and all nested <param>
* elements are cached as name:value string pairs to be passed as
* parameters when instantiating the plugin.
*
* Note: these cached values can be overriden for different quirk cases.
*/
// Returns the cached attributes array.
void GetPluginAttributes(nsTArray<mozilla::dom::MozPluginParameter>& aAttributes);
// Returns the cached <param> array.
void GetPluginParameters(nsTArray<mozilla::dom::MozPluginParameter>& aParameters);
/**
* Immediately instantiate a plugin instance. This is a no-op if mType !=
* eType_Plugin or a plugin is already running.
*
* aIsLoading indicates that we are in the loading code, and we can bypass
* the mIsLoading check.
*/
nsresult InstantiatePluginInstance(bool aIsLoading = false);
/**
* Notify this class the document state has changed
* Called by nsDocument so we may suspend plugins in inactive documents)
*/
void NotifyOwnerDocumentActivityChanged();
/**
* When a plug-in is instantiated, it can create a scriptable
* object that the page wants to interact with. We expose this
* object by placing it on the prototype chain of our element,
* between the element itself and its most-derived DOM prototype.
*
* SetupProtoChain handles actually inserting the plug-in
* scriptable object into the proto chain if needed.
*
* DoResolve is a hook that allows us to find out when the web
* page is looking up a property name on our object and make sure
* that our plug-in, if any, is instantiated.
*/
// Helper for WebIDL node wrapping
void SetupProtoChain(JSContext* aCx, JS::Handle<JSObject*> aObject);
// Remove plugin from protochain
void TeardownProtoChain();
// Helper for WebIDL NeedResolve
bool DoResolve(JSContext* aCx, JS::Handle<JSObject*> aObject,
JS::Handle<jsid> aId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc);
// The return value is whether DoResolve might end up resolving the given
// id. If in doubt, return true.
static bool MayResolve(jsid aId);
// Helper for WebIDL enumeration
void GetOwnPropertyNames(JSContext* aCx, JS::AutoIdVector& /* unused */,
bool /* unused */, mozilla::ErrorResult& aRv);
// WebIDL API
nsIDocument* GetContentDocument(nsIPrincipal& aSubjectPrincipal);
void GetActualType(nsAString& aType) const
{
CopyUTF8toUTF16(mContentType, aType);
}
uint32_t DisplayedType() const
{
return mType;
}
uint32_t GetContentTypeForMIMEType(const nsAString& aMIMEType)
{
return GetTypeOfContent(NS_ConvertUTF16toUTF8(aMIMEType), false);
}
void PlayPlugin(mozilla::dom::SystemCallerGuarantee,
mozilla::ErrorResult& aRv);
void Reload(bool aClearActivation, mozilla::ErrorResult& aRv)
{
aRv = Reload(aClearActivation);
}
bool Activated() const
{
return mActivated;
}
nsIURI* GetSrcURI() const
{
return mURI;
}
/**
* The default state that this plugin would be without manual activation.
* @returns PLUGIN_ACTIVE if the default state would be active.
*/
uint32_t DefaultFallbackType();
uint32_t PluginFallbackType() const
{
return mFallbackType;
}
bool HasRunningPlugin() const
{
return !!mInstanceOwner;
}
// FIXME rename this
void SkipFakePlugins(mozilla::ErrorResult& aRv)
{
aRv = SkipFakePlugins();
}
void SwapFrameLoaders(mozilla::dom::HTMLIFrameElement& aOtherLoaderOwner,
mozilla::ErrorResult& aRv)
{
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
}
void SwapFrameLoaders(nsXULElement& aOtherLoaderOwner,
mozilla::ErrorResult& aRv)
{
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
}
void LegacyCall(JSContext* aCx, JS::Handle<JS::Value> aThisVal,
const mozilla::dom::Sequence<JS::Value>& aArguments,
JS::MutableHandle<JS::Value> aRetval,
mozilla::ErrorResult& aRv);
uint32_t GetRunID(mozilla::dom::SystemCallerGuarantee,
mozilla::ErrorResult& aRv);
bool IsRewrittenYoutubeEmbed() const
{
return mRewrittenYoutubeEmbed;
}
void PresetOpenerWindow(mozIDOMWindowProxy* aOpenerWindow, mozilla::ErrorResult& aRv);
protected:
/**
* Begins loading the object when called
*
* Attributes of |this| QI'd to nsIContent will be inspected, depending on
* the node type. This function currently assumes it is a <object> or
* <embed> tag.
*
* The instantiated plugin depends on:
* - The URI (<embed src>, <object data>)
* - The type 'hint' (type attribute)
* - The mime type returned by opening the URI
* - Enabled plugins claiming the ultimate mime type
* - The capabilities returned by GetCapabilities
* - The classid attribute, if eSupportClassID is among the capabilities
*
* If eAllowPluginSkipChannel is true, we may skip opening the URI if our
* type hint points to a valid plugin, deferring that responsibility to the
* plugin.
* Similarly, if no URI is provided, but a type hint for a valid plugin is
* present, that plugin will be instantiated
*
* Otherwise a request to that URI is made and the type sent by the server
* is used to find a suitable handler, EXCEPT when:
* - The type hint refers to a *supported* plugin, in which case that
* plugin will be instantiated regardless of the server provided type
* - The server returns a binary-stream type, and our type hint refers to
* a valid non-document type, we will use the type hint
*
* @param aNotify If we should send notifications. If false, content
* loading may be deferred while appropriate frames are
* created
* @param aForceLoad If we should reload this content (and re-attempt the
* channel open) even if our parameters did not change
*/
nsresult LoadObject(bool aNotify,
bool aForceLoad = false);
enum Capabilities {
eSupportImages = 1u << 0, // Images are supported (imgILoader)
eSupportPlugins = 1u << 1, // Plugins are supported (nsIPluginHost)
eSupportDocuments = 1u << 2, // Documents are supported
// (nsIDocumentLoaderFactory)
// This flag always includes SVG
eSupportClassID = 1u << 3, // The classid attribute is supported. No
// longer used.
// If possible to get a *plugin* type from the type attribute *or* file
// extension, we can use that type and begin loading the plugin before
// opening a channel.
// A side effect of this is if the channel fails, the plugin is still
// running.
eAllowPluginSkipChannel = 1u << 4
};
/**
* Returns the list of capabilities this content node supports. This is a
* bitmask consisting of flags from the Capabilities enum.
*
* The default implementation supports all types but not
* eSupportClassID or eAllowPluginSkipChannel
*/
virtual uint32_t GetCapabilities() const;
/**
* Destroys all loaded documents/plugins and releases references
*/
void DestroyContent();
static void Traverse(nsObjectLoadingContent *tmp,
nsCycleCollectionTraversalCallback &cb);
void CreateStaticClone(nsObjectLoadingContent* aDest) const;
void DoStopPlugin(nsPluginInstanceOwner* aInstanceOwner);
nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandler);
void UnbindFromTree(bool aDeep = true,
bool aNullParent = true);
/**
* Return the content policy type used for loading the element.
*/
virtual nsContentPolicyType GetContentPolicyType() const = 0;
/**
* Decides whether we should load <embed>/<object> node content.
*
* If this is an <embed> or <object> node there are cases in which we should
* not try to load the content:
*
* - If the node is the child of a media element
* - If the node is the child of an <object> node that already has
* content being loaded.
*
* In these cases, this function will return false, which will cause
* us to skip calling LoadObject.
*/
bool BlockEmbedOrObjectContentLoading();
private:
// Object parameter changes returned by UpdateObjectParameters
enum ParameterUpdateFlags {
eParamNoChange = 0,
// Parameters that potentially affect the channel changed
// - mOriginalURI, mOriginalContentType
eParamChannelChanged = 1u << 0,
// Parameters that affect displayed content changed
// - mURI, mContentType, mType, mBaseURI
eParamStateChanged = 1u << 1,
// The effective content type changed, independant of object type. This
// can happen when changing from Loading -> Final type, but doesn't
// necessarily happen when changing between object types. E.g., if a PDF
// handler was installed between the last load of this object and now, we
// might change from eType_Document -> eType_Plugin without changing
// ContentType
eParamContentTypeChanged = 1u << 2
};
/**
* Getter for child <param> elements that are not nested in another plugin
* dom element.
* This is an internal helper function and should not be used directly for
* passing parameters to the plugin instance.
*
* See GetPluginParameters and GetPluginAttributes, which also handle
* quirk-overrides.
*
* @param aParameters The array containing pairs of name/value strings
* from nested <param> objects.
*/
void GetNestedParams(nsTArray<mozilla::dom::MozPluginParameter>& aParameters);
MOZ_MUST_USE nsresult BuildParametersArray();
/**
* Loads fallback content with the specified FallbackType
*
* @param aType FallbackType value for type of fallback we're loading
* @param aNotify Send notifications and events. If false, caller is
* responsible for doing so
*/
void LoadFallback(FallbackType aType, bool aNotify);
/**
* Internal version of LoadObject that should only be used by this class
* aLoadingChannel is passed by the LoadObject call from OnStartRequest,
* primarily for sanity-preservation
*/
nsresult LoadObject(bool aNotify,
bool aForceLoad,
nsIRequest *aLoadingChannel);
/**
* Introspects the object and sets the following member variables:
* - mOriginalContentType : This is the type attribute on the element
* - mOriginalURI : The src or data attribute on the element
* - mURI : The final URI, considering mChannel if
* mChannelLoaded is set
* - mContentType : The final content type, considering mChannel if
* mChannelLoaded is set
* - mBaseURI : The object's base URI, which may be set by the
* object
* - mType : The type the object is determined to be based
* on the above
*
* NOTE The class assumes that mType is the currently loaded type at various
* points, so the caller of this function must take the appropriate
* actions to ensure this
*
* NOTE This function does not perform security checks, only determining the
* requested type and parameters of the object.
*
* @return Returns a bitmask of ParameterUpdateFlags values
*/
ParameterUpdateFlags UpdateObjectParameters();
/**
* Queue a CheckPluginStopEvent and track it in mPendingCheckPluginStopEvent
*/
void QueueCheckPluginStopEvent();
void NotifyContentObjectWrapper();
/**
* Opens the channel pointed to by mURI into mChannel.
*/
nsresult OpenChannel();
/**
* Closes and releases references to mChannel and, if opened, mFinalListener
*/
nsresult CloseChannel();
/**
* If this object should be tested against blocking list.
*/
bool ShouldBlockContent();
/**
* If this object is allowed to play plugin content, or if it would display
* click-to-play instead.
* NOTE that this does not actually check if the object is a loadable plugin
* NOTE This ignores the current activated state. The caller should check
* this if appropriate.
*/
bool ShouldPlay(FallbackType &aReason);
/**
* This method tells if the fallback content should be attempted to be used
* over the original object content.
* It will look at prefs and this plugin's CTP state to make a decision.
*
* NOTE that this doesn't say whether the fallback _will_ be used, only whether
* we should look into it to possibly use it. The final answer will be
* given by the PreferFallback method.
*
* @param aIsPluginClickToPlay Whether this object instance is CTP.
*/
bool FavorFallbackMode(bool aIsPluginClickToPlay);
/**
* Whether the page has provided good fallback content to this object.
*/
bool HasGoodFallback();
/**
* This method tells the final answer on whether this object's fallback
* content should be used instead of the original plugin content.
*
* @param aIsPluginClickToPlay Whether this object instance is CTP.
*/
bool PreferFallback(bool aIsPluginClickToPlay);
/**
* Helper to check if our current URI passes policy
*
* @param aContentPolicy [out] The result of the content policy decision
*
* @return true if call succeeded and NS_CP_ACCEPTED(*aContentPolicy)
*/
bool CheckLoadPolicy(int16_t *aContentPolicy);
/**
* Helper to check if the object passes process policy. Assumes we have a
* final determined type.
*
* @param aContentPolicy [out] The result of the content policy decision
*
* @return true if call succeeded and NS_CP_ACCEPTED(*aContentPolicy)
*/
bool CheckProcessPolicy(int16_t *aContentPolicy);
/**
* Gets the plugin instance and creates a plugin stream listener, assigning
* it to mFinalListener
*/
bool MakePluginListener();
void SetupFrameLoader(int32_t aJSPluginId);
/**
* Helper to spawn mFrameLoader and return a pointer to its docshell
*
* @param aURI URI we intend to load for the recursive load check (does not
* actually load anything)
*/
already_AddRefed<nsIDocShell> SetupDocShell(nsIURI* aRecursionCheckURI);
/**
* Unloads all content and resets the object to a completely unloaded state
*
* NOTE Calls StopPluginInstance() and may spin the event loop
*
* @param aResetState Reset the object type to 'loading' and destroy channel
* as well
*/
void UnloadObject(bool aResetState = true);
/**
* Notifies document observes about a new type/state of this object.
* Triggers frame construction as needed. mType must be set correctly when
* this method is called. This method is cheap if the type and state didn't
* actually change.
*
* @param aSync If a synchronous frame construction is required. If false,
* the construction may either be sync or async.
* @param aNotify if false, only need to update the state of our element.
*/
void NotifyStateChanged(ObjectType aOldType,
mozilla::EventStates aOldState,
bool aSync, bool aNotify);
/**
* Returns a ObjectType value corresponding to the type of content we would
* support the given MIME type as, taking capabilities and plugin state
* into account
*
* @param aNoFakePlugin Don't select a fake plugin handler as a valid type,
* as when SkipFakePlugins() is called.
* @return The ObjectType enum value that we would attempt to load
*
* NOTE this does not consider whether the content would be suppressed by
* click-to-play or other content policy checks
*/
ObjectType GetTypeOfContent(const nsCString& aMIMEType, bool aNoFakePlugin);
/**
* Gets the frame that's associated with this content node.
* Does not flush.
*/
nsPluginFrame* GetExistingFrame();
/**
* Used for identifying whether we can rewrite a youtube flash embed to
* possibly use HTML5 instead.
*
* Returns true if plugin.rewrite_youtube_embeds pref is true and the
* element this nsObjectLoadingContent instance represents:
*
* - is an embed or object node
* - has a URL pointing at the youtube.com domain, using "/v/" style video
* path reference.
*
* Having the enablejsapi flag means the document that contains the element
* could possibly be manipulating the youtube video elsewhere on the page
* via javascript. In the context of embed elements, this usage has been
* deprecated by youtube, so we can just rewrite as normal.
*
* If we can rewrite the URL, we change the "/v/" to "/embed/", and change
* our type to eType_Document so that we render similarly to an iframe
* embed.
*/
void MaybeRewriteYoutubeEmbed(nsIURI* aURI,
nsIURI* aBaseURI,
nsIURI** aRewrittenURI);
// Helper class for SetupProtoChain
class SetupProtoChainRunner final : public nsIRunnable
{
~SetupProtoChainRunner() = default;
public:
NS_DECL_ISUPPORTS
explicit SetupProtoChainRunner(nsObjectLoadingContent* aContent);
NS_IMETHOD Run() override;
private:
// We store an nsIObjectLoadingContent because we can
// unambiguously refcount that.
RefPtr<nsIObjectLoadingContent> mContent;
};
// Utility getter for getting our nsNPAPIPluginInstance in a safe way.
nsresult ScriptRequestPluginInstance(JSContext* aCx,
nsNPAPIPluginInstance** aResult);
// Utility method for getting our plugin JSObject
static nsresult GetPluginJSObject(JSContext *cx,
JS::Handle<JSObject*> obj,
nsNPAPIPluginInstance *plugin_inst,
JS::MutableHandle<JSObject*> plugin_obj,
JS::MutableHandle<JSObject*> plugin_proto);
// Utility for firing an error event, if we're an <object>.
void MaybeFireErrorEvent();
// The final listener for mChannel (uriloader, pluginstreamlistener, etc.)
nsCOMPtr<nsIStreamListener> mFinalListener;
// Frame loader, for content documents we load.
RefPtr<nsFrameLoader> mFrameLoader;
// Track if we have a pending AsyncInstantiateEvent
nsCOMPtr<nsIRunnable> mPendingInstantiateEvent;
// Tracks if we have a pending CheckPluginStopEvent
nsCOMPtr<nsIRunnable> mPendingCheckPluginStopEvent;
// The content type of our current load target, updated by
// UpdateObjectParameters(). Takes the channel's type into account once
// opened.
//
// May change if a channel is opened, does not imply a loaded state
nsCString mContentType;
// The content type 'hint' provided by the element's type attribute. May
// or may not be used as a final type
nsCString mOriginalContentType;
// The channel that's currently being loaded. If set, but mChannelLoaded is
// false, has not yet reached OnStartRequest
nsCOMPtr<nsIChannel> mChannel;
// The URI of the current content.
// May change as we open channels and encounter redirects - does not imply
// a loaded type
nsCOMPtr<nsIURI> mURI;
// The original URI obtained from inspecting the element. May differ from
// mURI due to redirects
nsCOMPtr<nsIURI> mOriginalURI;
// The baseURI used for constructing mURI.
nsCOMPtr<nsIURI> mBaseURI;
// Type of the currently-loaded content.
ObjectType mType : 8;
// The type of fallback content we're showing (see ObjectState())
FallbackType mFallbackType : 8;
uint32_t mRunID;
bool mHasRunID : 1;
// If true, we have opened a channel as the listener and it has reached
// OnStartRequest. Does not get set for channels that are passed directly to
// the plugin listener.
bool mChannelLoaded : 1;
// Whether we are about to call instantiate on our frame. If we aren't,
// SetFrame needs to asynchronously call Instantiate.
bool mInstantiating : 1;
// True when the object is created for an element which the parser has
// created using NS_FROM_PARSER_NETWORK flag. If the element is modified,
// it may lose the flag.
bool mNetworkCreated : 1;
// Used to keep track of whether or not a plugin has been explicitly
// activated by PlayPlugin(). (see ShouldPlay())
bool mActivated : 1;
// Whether content blocking is enabled or not for this object.
bool mContentBlockingEnabled : 1;
// If we should not use fake plugins until the next type change
bool mSkipFakePlugins : 1;
// Protects DoStopPlugin from reentry (bug 724781).
bool mIsStopping : 1;
// Protects LoadObject from re-entry
bool mIsLoading : 1;
// For plugin stand-in types (click-to-play) tracks whether content js has
// tried to access the plugin script object.
bool mScriptRequested : 1;
// True if object represents an object/embed tag pointing to a flash embed
// for a youtube video. When possible (see IsRewritableYoutubeEmbed function
// comments for details), we change these to try to load HTML5 versions of
// videos.
bool mRewrittenYoutubeEmbed : 1;
// Cache the answer of PreferFallback() because ShouldPlay is called several
// times during the load process.
bool mPreferFallback : 1;
bool mPreferFallbackKnown : 1;
WeakFrame mPrintFrame;
RefPtr<nsPluginInstanceOwner> mInstanceOwner;
nsTArray<mozilla::dom::MozPluginParameter> mCachedAttributes;
nsTArray<mozilla::dom::MozPluginParameter> mCachedParameters;
};
#endif