Reduce repetitive EventTarget subclassing

Source/core/workers/AbstractWorker.h

 /*
  * Copyright (C) 2010 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 29 matching lines @@
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/text/AtomicStringHash.h"
 
 namespace WebCore {
 
 class ExceptionState;
 class KURL;
 class ScriptExecutionContext;
 
-class AbstractWorker : public RefCounted<AbstractWorker>, public EventTarget, public ActiveDOMObject {
+class AbstractWorker : public RefCounted<AbstractWorker>, public EventTargetWithInlineData, public ActiveDOMObject {
 public:
     // EventTarget APIs
     virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE { return ActiveDOMObject::scriptExecutionContext(); }
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
 
     using RefCounted<AbstractWorker>::ref;
     using RefCounted<AbstractWorker>::deref;
 
     virtual void contextDestroyed() OVERRIDE;
     AbstractWorker(ScriptExecutionContext*);
     virtual ~AbstractWorker();
 
 protected:
     // Helper function that converts a URL to an absolute URL and checks the result for validity.
     KURL resolveURL(const String& url, ExceptionState&);
     intptr_t asID() const { return reinterpret_cast<intptr_t>(this); }
 
 private:
     virtual void refEventTarget() OVERRIDE { ref(); }
     virtual void derefEventTarget() OVERRIDE { deref(); }
-    virtual EventTargetData* eventTargetData() OVERRIDE;
-    virtual EventTargetData* ensureEventTargetData() OVERRIDE;
-
-    EventTargetData m_eventTargetData;
 };
 
 } // namespace WebCore
 
 #endif // AbstractWorker_h