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

Source/core/html/track/TextTrackCue.h

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2012, 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 24 matching lines @@
 #include "core/events/EventTarget.h"
 #include "core/html/HTMLDivElement.h"
 #include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class ExceptionState;
 
 class TextTrackCue : public RefCountedWillBeRefCountedGarbageCollected<TextTrackCue>, public EventTargetWithInlineData {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<TextTrackCue>);
+    REFCOUNTED_EVENT_TARGET(TextTrackCue);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TextTrackCue);
 public:
     static const AtomicString& cueShadowPseudoId()
     {
         DEFINE_STATIC_LOCAL(const AtomicString, cue, ("cue", AtomicString::ConstructFromLiteral));
         return cue;
     }
 
     virtual ~TextTrackCue() { }
 
     TextTrack* track() const;
@@ skipping 32 matching lines @@
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
 #ifndef NDEBUG
     virtual String toString() const = 0;
 #endif
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(enter);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(exit);
 
-    virtual void trace(Visitor*);
+    virtual void trace(Visitor*) OVERRIDE;
 
 protected:
     TextTrackCue(double start, double end);
 
     void cueWillChange();
     virtual void cueDidChange();
 
 private:
     AtomicString m_id;
     double m_startTime;
     double m_endTime;
     int m_cueIndex;
 
     RawPtrWillBeMember<TextTrack> m_track;
 
     bool m_isActive : 1;
     bool m_pauseOnExit : 1;
 };
 
 } // namespace WebCore
 
 #endif