Reduce repetitive EventTarget subclassing

Source/modules/mediastream/RTCPeerConnection.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
@@ skipping 38 matching lines @@
 class MediaStreamTrack;
 class RTCConfiguration;
 class RTCDTMFSender;
 class RTCDataChannel;
 class RTCErrorCallback;
 class RTCSessionDescription;
 class RTCSessionDescriptionCallback;
 class RTCStatsCallback;
 class VoidCallback;
 
-class RTCPeerConnection : public RefCounted<RTCPeerConnection>, public ScriptWrappable, public RTCPeerConnectionHandlerClient, public EventTarget, public ActiveDOMObject {
+class RTCPeerConnection : public RefCounted<RTCPeerConnection>, public ScriptWrappable, public RTCPeerConnectionHandlerClient, public EventTargetWithInlineData, public ActiveDOMObject {
 public:
     static PassRefPtr<RTCPeerConnection> create(ScriptExecutionContext*, const Dictionary& rtcConfiguration, const Dictionary& mediaConstraints, ExceptionState&);
     ~RTCPeerConnection();
 
     void createOffer(PassRefPtr<RTCSessionDescriptionCallback>, PassRefPtr<RTCErrorCallback>, const Dictionary& mediaConstraints, ExceptionState&);
 
     void createAnswer(PassRefPtr<RTCSessionDescriptionCallback>, PassRefPtr<RTCErrorCallback>, const Dictionary& mediaConstraints, ExceptionState&);
 
     void setLocalDescription(PassRefPtr<RTCSessionDescription>, PassRefPtr<VoidCallback>, PassRefPtr<RTCErrorCallback>, ExceptionState&);
     PassRefPtr<RTCSessionDescription> localDescription(ExceptionState&);
@@ skipping 63 matching lines @@
 
 private:
     RTCPeerConnection(ScriptExecutionContext*, PassRefPtr<RTCConfiguration>, PassRefPtr<MediaConstraints>, ExceptionState&);
 
     static PassRefPtr<RTCConfiguration> parseConfiguration(const Dictionary& configuration, ExceptionState&);
     void scheduleDispatchEvent(PassRefPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCPeerConnection>*);
     bool hasLocalStreamWithTrackId(const String& trackId);
 
     // EventTarget implementation.
-    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(); }
 
     void changeSignalingState(SignalingState);
     void changeIceGatheringState(IceGatheringState);
     void changeIceConnectionState(IceConnectionState);
 
     SignalingState m_signalingState;
     IceGatheringState m_iceGatheringState;
     IceConnectionState m_iceConnectionState;
 
     MediaStreamVector m_localStreams;
     MediaStreamVector m_remoteStreams;
 
     Vector<RefPtr<RTCDataChannel> > m_dataChannels;
 
     OwnPtr<RTCPeerConnectionHandler> m_peerHandler;
 
     Timer<RTCPeerConnection> m_scheduledEventTimer;
     Vector<RefPtr<Event> > m_scheduledEvents;
 
     bool m_stopped;
 };
 
 } // namespace WebCore
 
 #endif // RTCPeerConnection_h