Reduce repetitive EventTarget subclassing

Source/modules/mediasource/MediaSourceBase.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 #include "core/platform/graphics/MediaSourcePrivate.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class ExceptionState;
 class GenericEventQueue;
 
-class MediaSourceBase : public RefCounted<MediaSourceBase>, public HTMLMediaSource, public ActiveDOMObject, public EventTarget {
+class MediaSourceBase : public RefCounted<MediaSourceBase>, public HTMLMediaSource, public ActiveDOMObject, public EventTargetWithInlineData {
 public:
     static const AtomicString& openKeyword();
     static const AtomicString& closedKeyword();
     static const AtomicString& endedKeyword();
 
     virtual ~MediaSourceBase();
 
     void addedToRegistry();
     void removedFromRegistry();
     void openIfInEndedState();
@@ skipping 14 matching lines @@
     void setReadyState(const AtomicString&);
     void endOfStream(const AtomicString& error, ExceptionState&);
 
 
     // ActiveDOMObject interface
     virtual bool hasPendingActivity() const OVERRIDE;
     virtual void stop() OVERRIDE;
 
     // EventTarget interface
     virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
-    virtual EventTargetData* eventTargetData() OVERRIDE;
-    virtual EventTargetData* ensureEventTargetData() OVERRIDE;
     virtual void refEventTarget() OVERRIDE { ref(); }
     virtual void derefEventTarget() OVERRIDE { deref(); }
 
     // URLRegistrable interface
     virtual URLRegistry& registry() const OVERRIDE;
 
     using RefCounted<MediaSourceBase>::ref;
     using RefCounted<MediaSourceBase>::deref;
 
 protected:
     explicit MediaSourceBase(ScriptExecutionContext*);
 
     virtual void onReadyStateChange(const AtomicString& oldState, const AtomicString& newState) = 0;
     virtual Vector<RefPtr<TimeRanges> > activeRanges() const = 0;
 
     PassOwnPtr<SourceBufferPrivate> createSourceBufferPrivate(const String& type, const MediaSourcePrivate::CodecsArray&, ExceptionState&);
     void scheduleEvent(const AtomicString& eventName);
     GenericEventQueue* asyncEventQueue() const { return m_asyncEventQueue.get(); }
 
 private:
     OwnPtr<MediaSourcePrivate> m_private;
-    EventTargetData m_eventTargetData;
     AtomicString m_readyState;
     OwnPtr<GenericEventQueue> m_asyncEventQueue;
     HTMLMediaElement* m_attachedElement;
 };
 
 }
 
 #endif