Bug 1102665 - Invalidate stream video frames in the regular stream state event queue. r=roc

dom/media/DOMMediaStream.cpp

@@ -93,7 +93,7 @@ public:
       nsRefPtr<TrackChange> runnable =
         new TrackChange(this, aID, aTrackOffset, aTrackEvents,
                         aQueuedMedia.GetType());
-      NS_DispatchToMainThread(runnable);
+      aGraph->DispatchToMainThreadAfterStreamStateUpdate(runnable.forget());
     }
   }
 

dom/media/MediaStreamGraph.cpp

@@ -1136,7 +1136,7 @@ MediaStreamGraphImpl::PlayVideo(MediaStream* aStream)
 
     nsCOMPtr<nsIRunnable> event =
       NS_NewRunnableMethod(output, &VideoFrameContainer::Invalidate);
-    NS_DispatchToMainThread(event);
+    DispatchToMainThreadAfterStreamStateUpdate(event.forget());
   }
   if (!aStream->mNotifiedFinished) {
     aStream->mLastPlayedVideoFrame = *frame;