Reduce repetitive EventTarget subclassing

Source/modules/mediastream/MediaStream.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011, 2012 Ericsson AB. 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 251 matching lines @@
 const AtomicString& MediaStream::interfaceName() const
 {
     return eventNames().interfaceForMediaStream;
 }
 
 ScriptExecutionContext* MediaStream::scriptExecutionContext() const
 {
     return ContextLifecycleObserver::scriptExecutionContext();
 }
 
-EventTargetData* MediaStream::eventTargetData()
-{
-    return &m_eventTargetData;
-}
-
-EventTargetData* MediaStream::ensureEventTargetData()
-{
-    return &m_eventTargetData;
-}
-
 void MediaStream::addRemoteTrack(MediaStreamComponent* component)
 {
     ASSERT(component && !component->stream());
     if (ended())
         return;
 
     component->setStream(descriptor());
 
     RefPtr<MediaStreamTrack> track = MediaStreamTrack::create(scriptExecutionContext(), component);
     switch (component->source()->type()) {
@@ skipping 63 matching lines @@
 
     events.clear();
 }
 
 URLRegistry& MediaStream::registry() const
 {
     return MediaStreamRegistry::registry();
 }
 
 } // namespace WebCore