Reduce repetitive EventTarget subclassing

Source/core/html/track/TextTrackList.h

 /*
  * Copyright (C) 2011, 2012 Apple 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 22 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class HTMLMediaElement;
 class TextTrack;
 class TextTrackList;
 
-class TextTrackList : public RefCounted<TextTrackList>, public ScriptWrappable, public EventTarget {
+class TextTrackList : public RefCounted<TextTrackList>, public ScriptWrappable, public EventTargetWithInlineData {
 public:
     static PassRefPtr<TextTrackList> create(HTMLMediaElement* owner, ScriptExecutionContext* context)
     {
         return adoptRef(new TextTrackList(owner, context));
     }
     ~TextTrackList();
 
     unsigned length() const;
     int getTrackIndex(TextTrack*);
     int getTrackIndexRelativeToRenderedTracks(TextTrack*);
     bool contains(TextTrack*) const;
 
     TextTrack* item(unsigned index);
     void append(PassRefPtr<TextTrack>);
     void remove(TextTrack*);
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const;
+    virtual const AtomicString& interfaceName() const OVERRIDE;
     using RefCounted<TextTrackList>::ref;
     using RefCounted<TextTrackList>::deref;
-    virtual ScriptExecutionContext* scriptExecutionContext() const { return m_context; }
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE { return m_context; }
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(addtrack);
 
     void clearOwner() { m_owner = 0; }
     Node* owner() const;
 
     bool isFiringEventListeners() { return m_dispatchingEvents; }
 
 private:
     TextTrackList(HTMLMediaElement*, ScriptExecutionContext*);
 
     // EventTarget
-    virtual void refEventTarget() { ref(); }
-    virtual void derefEventTarget() { deref(); }
-    virtual EventTargetData* eventTargetData() { return &m_eventTargetData; }
-    virtual EventTargetData* ensureEventTargetData() { return &m_eventTargetData; }
+    virtual void refEventTarget() OVERRIDE { ref(); }
+    virtual void derefEventTarget() OVERRIDE { deref(); }
 
     void scheduleAddTrackEvent(PassRefPtr<TextTrack>);
     void asyncEventTimerFired(Timer<TextTrackList>*);
 
     void invalidateTrackIndexesAfterTrack(TextTrack*);
 
     ScriptExecutionContext* m_context;
     HTMLMediaElement* m_owner;
 
     Vector<RefPtr<Event> > m_pendingEvents;
     Timer<TextTrackList> m_pendingEventTimer;
 
-    EventTargetData m_eventTargetData;
     Vector<RefPtr<TextTrack> > m_addTrackTracks;
     Vector<RefPtr<TextTrack> > m_elementTracks;
     Vector<RefPtr<TextTrack> > m_inbandTracks;
 
     int m_dispatchingEvents;
 };
 
 } // namespace WebCore
 
 #endif