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

Source/modules/mediastream/RTCDTMFSender.h

 /*
  * Copyright (C) 2013 Google 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 26 matching lines @@
 class WebRTCDTMFSenderHandler;
 class WebRTCPeerConnectionHandler;
 }
 
 namespace WebCore {
 
 class ExceptionState;
 class MediaStreamTrack;
 
 class RTCDTMFSender FINAL : public RefCountedWillBeRefCountedGarbageCollected<RTCDTMFSender>, public ScriptWrappable, public EventTargetWithInlineData, public blink::WebRTCDTMFSenderHandlerClient, public ActiveDOMObject {
-    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<RTCDTMFSender>);
+    REFCOUNTED_EVENT_TARGET(RTCDTMFSender);
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RTCDTMFSender);
 public:
     static PassRefPtrWillBeRawPtr<RTCDTMFSender> create(ExecutionContext*, blink::WebRTCPeerConnectionHandler*, PassRefPtrWillBeRawPtr<MediaStreamTrack>, ExceptionState&);
     virtual ~RTCDTMFSender();
 
     bool canInsertDTMF() const;
     MediaStreamTrack* track() const;
     String toneBuffer() const;
     long duration() const { return m_duration; }
     long interToneGap() const { return m_interToneGap; }
 
     void insertDTMF(const String& tones, ExceptionState&);
     void insertDTMF(const String& tones, long duration, ExceptionState&);
     void insertDTMF(const String& tones, long duration, long interToneGap, ExceptionState&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(tonechange);
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE;
 
     // ActiveDOMObject
     virtual void stop() OVERRIDE;
 
-    void trace(Visitor*);
+    virtual void trace(Visitor*) OVERRIDE;
 
 private:
     RTCDTMFSender(ExecutionContext*, PassRefPtrWillBeRawPtr<MediaStreamTrack>, PassOwnPtr<blink::WebRTCDTMFSenderHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDTMFSender>*);
 
     // blink::WebRTCDTMFSenderHandlerClient
     virtual void didPlayTone(const blink::WebString&) OVERRIDE;
 
     RefPtrWillBeMember<MediaStreamTrack> m_track;
     long m_duration;
     long m_interToneGap;
 
     OwnPtr<blink::WebRTCDTMFSenderHandler> m_handler;
 
     bool m_stopped;
 
     Timer<RTCDTMFSender> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event> > m_scheduledEvents;
 };
 
 } // namespace WebCore
 
 #endif // RTCDTMFSender_h