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

Source/core/html/track/TextTrackList.h

 /*
  * Copyright (C) 2011, 2012 Apple Inc.  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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class GenericEventQueue;
 class TextTrack;
 
 class TextTrackList FINAL : public RefCountedWillBeRefCountedGarbageCollected<TextTrackList>, public ScriptWrappable, public EventTargetWithInlineData {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<TextTrackList>);
+    REFCOUNTED_EVENT_TARGET(TextTrackList);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TextTrackList);
 public:
     static PassRefPtrWillBeRawPtr<TextTrackList> create(HTMLMediaElement* owner)
     {
         return adoptRefWillBeRefCountedGarbageCollected(new TextTrackList(owner));
     }
     virtual ~TextTrackList();
 
     unsigned length() const;
     int getTrackIndex(TextTrack*);
     int getTrackIndexRelativeToRenderedTracks(TextTrack*);
@@ skipping 13 matching lines @@
     DEFINE_ATTRIBUTE_EVENT_LISTENER(removetrack);
 
 #if !ENABLE(OILPAN)
     void clearOwner();
 #endif
     HTMLMediaElement* owner() const;
 
     void scheduleChangeEvent();
     void removeAllInbandTracks();
 
-    void trace(Visitor*);
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     explicit TextTrackList(HTMLMediaElement*);
 
     void scheduleTrackEvent(const AtomicString& eventName, PassRefPtrWillBeRawPtr<TextTrack>);
 
     void scheduleAddTrackEvent(PassRefPtrWillBeRawPtr<TextTrack>);
     void scheduleRemoveTrackEvent(PassRefPtrWillBeRawPtr<TextTrack>);
 
     void invalidateTrackIndexesAfterTrack(TextTrack*);
 
     RawPtrWillBeMember<HTMLMediaElement> m_owner;
 
     OwnPtr<GenericEventQueue> m_asyncEventQueue;
 
     WillBeHeapVector<RefPtrWillBeMember<TextTrack> > m_addTrackTracks;
     WillBeHeapVector<RefPtrWillBeMember<TextTrack> > m_elementTracks;
     WillBeHeapVector<RefPtrWillBeMember<TextTrack> > m_inbandTracks;
 };
 
 } // namespace WebCore
 
 #endif