Reduce repetitive EventTarget subclassing

Source/core/dom/NamedFlow.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. 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 27 matching lines @@
 
 namespace WebCore {
 
 class Document;
 class NamedFlowCollection;
 class Node;
 class NodeList;
 class RenderNamedFlowThread;
 class ScriptExecutionContext;
 
-class NamedFlow : public RefCounted<NamedFlow>, public ScriptWrappable, public EventTarget {
+class NamedFlow : public RefCounted<NamedFlow>, public ScriptWrappable, public EventTargetWithInlineData {
 public:
     static PassRefPtr<NamedFlow> create(PassRefPtr<NamedFlowCollection> manager, const AtomicString& flowThreadName);
 
     ~NamedFlow();
 
     const AtomicString& name() const;
     bool overset() const;
     int firstEmptyRegionIndex() const;
     PassRefPtr<NodeList> getRegionsByContent(Node*);
     PassRefPtr<NodeList> getRegions();
     PassRefPtr<NodeList> getContent();
 
     using RefCounted<NamedFlow>::ref;
     using RefCounted<NamedFlow>::deref;
 
-    virtual const AtomicString& interfaceName() const;
-    virtual ScriptExecutionContext* scriptExecutionContext() const;
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
 
     // This function is called from the JS binding code to determine if the NamedFlow object is reachable or not.
     // If the object has listeners, the object should only be discarded if the parent Document is not reachable.
     Node* ownerNode() const;
 
     void setRenderer(RenderNamedFlowThread* parentFlowThread);
 
     enum FlowState {
         FlowStateCreated,
         FlowStateNull
     };
 
     FlowState flowState() const { return m_parentFlowThread ? FlowStateCreated : FlowStateNull; }
 
     void dispatchRegionLayoutUpdateEvent();
     void dispatchRegionOversetChangeEvent();
 
 private:
     NamedFlow(PassRefPtr<NamedFlowCollection>, const AtomicString&);
 
     // EventTarget implementation.
-    virtual void refEventTarget() { ref(); }
-    virtual void derefEventTarget() { deref(); }
-
-    virtual EventTargetData* eventTargetData() OVERRIDE;
-    virtual EventTargetData* ensureEventTargetData() OVERRIDE;
+    virtual void refEventTarget() OVERRIDE { ref(); }
+    virtual void derefEventTarget() OVERRIDE { deref(); }
 
     // The name of the flow thread as specified in CSS.
     AtomicString m_flowThreadName;
 
     RefPtr<NamedFlowCollection> m_flowManager;
     RenderNamedFlowThread* m_parentFlowThread;
-
-    EventTargetData m_eventTargetData;
 };
 
 }
 
 #endif