Reduce repetitive EventTarget subclassing

Source/core/page/EventSource.h

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 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.
@@ skipping 32 matching lines @@
 
 namespace WebCore {
 
 class Dictionary;
 class ExceptionState;
 class MessageEvent;
 class ResourceResponse;
 class TextResourceDecoder;
 class ThreadableLoader;
 
-class EventSource : public RefCounted<EventSource>, public ScriptWrappable, public EventTarget, private ThreadableLoaderClient, public ActiveDOMObject {
+class EventSource : public RefCounted<EventSource>, public ScriptWrappable, public EventTargetWithInlineData, private ThreadableLoaderClient, public ActiveDOMObject {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassRefPtr<EventSource> create(ScriptExecutionContext*, const String& url, const Dictionary&, ExceptionState&);
     virtual ~EventSource();
 
     static const unsigned long long defaultReconnectDelay;
 
     String url() const;
     bool withCredentials() const;
 
     typedef short State;
     static const State CONNECTING = 0;
     static const State OPEN = 1;
     static const State CLOSED = 2;
 
     State readyState() const;
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(open);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
 
     void close();
 
     using RefCounted<EventSource>::ref;
     using RefCounted<EventSource>::deref;
 
-    virtual const AtomicString& interfaceName() const;
-    virtual ScriptExecutionContext* scriptExecutionContext() const;
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
 
     virtual void stop();
 
 private:
     EventSource(ScriptExecutionContext*, const KURL&, const Dictionary&);
 
-    virtual void refEventTarget() { ref(); }
-    virtual void derefEventTarget() { deref(); }
-    virtual EventTargetData* eventTargetData();
-    virtual EventTargetData* ensureEventTargetData();
+    virtual void refEventTarget() OVERRIDE { ref(); }
+    virtual void derefEventTarget() OVERRIDE { deref(); }
 
     virtual void didReceiveResponse(unsigned long, const ResourceResponse&);
     virtual void didReceiveData(const char*, int);
     virtual void didFinishLoading(unsigned long, double);
     virtual void didFail(const ResourceError&);
     virtual void didFailAccessControlCheck(const ResourceError&);
     virtual void didFailRedirectCheck();
 
     void connect();
     void networkRequestEnded();
@@ skipping 14 matching lines @@
     Vector<UChar> m_receiveBuf;
     bool m_discardTrailingNewline;
     bool m_requestInFlight;
 
     String m_eventName;
     Vector<UChar> m_data;
     String m_currentlyParsedEventId;
     String m_lastEventId;
     unsigned long long m_reconnectDelay;
     String m_eventStreamOrigin;
-
-    EventTargetData m_eventTargetData;
 };
 
 } // namespace WebCore
 
 #endif // EventSource_h