Reduce repetitive EventTarget subclassing

Source/modules/mediastream/RTCDataChannel.h

 /*
  * Copyright (C) 2012 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 24 matching lines @@
 struct WebRTCDataChannelInit;
 }
 
 namespace WebCore {
 
 class Blob;
 class ExceptionState;
 class RTCDataChannelHandler;
 class RTCPeerConnectionHandler;
 
-class RTCDataChannel : public RefCounted<RTCDataChannel>, public ScriptWrappable, public EventTarget, public RTCDataChannelHandlerClient {
+class RTCDataChannel : public RefCounted<RTCDataChannel>, public ScriptWrappable, public EventTargetWithInlineData, public RTCDataChannelHandlerClient {
 public:
     static PassRefPtr<RTCDataChannel> create(ScriptExecutionContext*, PassOwnPtr<RTCDataChannelHandler>);
     static PassRefPtr<RTCDataChannel> create(ScriptExecutionContext*, RTCPeerConnectionHandler*, const String& label, const WebKit::WebRTCDataChannelInit&, ExceptionState&);
     ~RTCDataChannel();
 
     String label() const;
 
     // DEPRECATED
     bool reliable() const;
 
@@ skipping 30 matching lines @@
     using RefCounted<RTCDataChannel>::ref;
     using RefCounted<RTCDataChannel>::deref;
 
 private:
     RTCDataChannel(ScriptExecutionContext*, PassOwnPtr<RTCDataChannelHandler>);
 
     void scheduleDispatchEvent(PassRefPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDataChannel>*);
 
     // EventTarget
-    virtual EventTargetData* eventTargetData();
-    virtual EventTargetData* ensureEventTargetData();
-    virtual void refEventTarget() { ref(); }
-    virtual void derefEventTarget() { deref(); }
-    EventTargetData m_eventTargetData;
+    virtual void refEventTarget() OVERRIDE { ref(); }
+    virtual void derefEventTarget() OVERRIDE { deref(); }
     ScriptExecutionContext* m_scriptExecutionContext;
 
     // RTCDataChannelHandlerClient
     virtual void didChangeReadyState(ReadyState) OVERRIDE;
     virtual void didReceiveStringData(const String&) OVERRIDE;
     virtual void didReceiveRawData(const char*, size_t) OVERRIDE;
     virtual void didDetectError() OVERRIDE;
 
     OwnPtr<RTCDataChannelHandler> m_handler;
 
     bool m_stopped;
 
     ReadyState m_readyState;
     enum BinaryType {
         BinaryTypeBlob,
         BinaryTypeArrayBuffer
     };
     BinaryType m_binaryType;
 
     Timer<RTCDataChannel> m_scheduledEventTimer;
     Vector<RefPtr<Event> > m_scheduledEvents;
 };
 
 } // namespace WebCore
 
 #endif // RTCDataChannel_h