Merge mozilla-central to autoland. r=merge a=merge on a CLOSED TREE

accessible/base/NotificationController.cpp

@@ -635,6 +635,9 @@ NotificationController::WillRefresh(mozilla::TimeStamp aTime)
   // e.g. tab event and content event.
   if (WaitingForParent()) {
     mDocument->ParentDocument()->mNotificationController->WillRefresh(aTime);
+    if (!mDocument) {
+      return;
+    }
   }
 
   // Any generic notifications should be queued if we're processing content

ipc/glue/IPCMessageUtils.h

@@ -14,6 +14,7 @@
 #include "mozilla/Attributes.h"
 #include "mozilla/DebugOnly.h"
 #include "mozilla/dom/ipc/StructuredCloneData.h"
+#include "mozilla/EnumSet.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/net/WebSocketFrame.h"
 #include "mozilla/TimeStamp.h"
@@ -918,6 +919,27 @@ struct ParamTraits<mozilla::Maybe<T>>
   }
 };
 
+template<typename T>
+struct ParamTraits<mozilla::EnumSet<T>>
+{
+  typedef mozilla::EnumSet<T> paramType;
+
+  static void Write(Message* msg, const paramType& param)
+  {
+    WriteParam(msg, param.serialize());
+  }
+
+  static bool Read(const Message* msg, PickleIterator* iter, paramType* result)
+  {
+    decltype(result->serialize()) tmp;
+    if (ReadParam(msg, iter, &tmp)) {
+      result->deserialize(tmp);
+      return true;
+    }
+    return false;
+  }
+};
+
 template<class... Ts>
 struct ParamTraits<mozilla::Variant<Ts...>>
 {

taskcluster/docker/recipes/run-task

@@ -547,7 +547,6 @@ def main(args):
 
     prepare_checkout_dir(args.vcs_checkout)
     prepare_checkout_dir(args.tools_checkout)
-    prepare_checkout_dir(args.comm_checkout)
     if args.vcs_checkout or args.tools_checkout or args.comm_checkout:
         prepare_hg_store_path()