Oilpan: Allocate all EventTarget derived types on the manged heap.

Source/modules/mediastream/MediaStreamTrack.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Ericsson AB. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 27 matching lines @@
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class AudioSourceProvider;
 class ExceptionState;
 class MediaStreamComponent;
 class MediaStreamTrackSourcesCallback;
 
-class MediaStreamTrack FINAL : public RefCounted<MediaStreamTrack>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public MediaStreamSource::Observer {
+class MediaStreamTrack FINAL : public RefCountedWillBeRefCountedGarbageCollected<MediaStreamTrack>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public MediaStreamSource::Observer {
     REFCOUNTED_EVENT_TARGET(MediaStreamTrack);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaStreamTrack);
 public:
     class Observer {
     public:
         virtual ~Observer() { }
         virtual void trackEnded() = 0;
     };
 
     static PassRefPtr<MediaStreamTrack> create(ExecutionContext*, MediaStreamComponent*);
     virtual ~MediaStreamTrack();
 
@@ skipping 31 matching lines @@
 
 private:
     MediaStreamTrack(ExecutionContext*, MediaStreamComponent*);
 
     MediaStreamSource::ReadyState m_readyState;
 
     // MediaStreamSourceObserver
     virtual void sourceChangedState() OVERRIDE;
 
     void propagateTrackEnded();
     Vector<Observer*> m_observers;

[haraken, 2014/05/27 01:39:19]

Probably should we make this a HeapHashSet of a weak members?

[zerny-chromium, 2014/05/27 07:34:33]

I'll defer that to a follow-up CL.

[haraken, 2014/05/27 07:56:26]

keishi@ just landed a CL that moves modules/mediastream to oilpan's heap. You'll
need to rebase with it, but the rebase will resolve this issue.

     bool m_isIteratingObservers;
 
     bool m_stopped;
     RefPtr<MediaStreamComponent> m_component;
 };
 
 typedef Vector<RefPtr<MediaStreamTrack> > MediaStreamTrackVector;
 
 } // namespace WebCore
 
 #endif // MediaStreamTrack_h