Reduce repetitive EventTarget subclassing

Source/core/page/Performance.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 35 matching lines @@
 
 namespace WebCore {
 
 class Document;
 class ExceptionState;
 class ResourceRequest;
 class ResourceResponse;
 class ResourceTimingInfo;
 class UserTiming;
 
-class Performance : public ScriptWrappable, public RefCounted<Performance>, public DOMWindowProperty, public EventTarget {
+class Performance : public ScriptWrappable, public RefCounted<Performance>, public DOMWindowProperty, public EventTargetWithInlineData {
 public:
     static PassRefPtr<Performance> create(Frame* frame) { return adoptRef(new Performance(frame)); }
     ~Performance();
 
-    virtual const AtomicString& interfaceName() const;
-    virtual ScriptExecutionContext* scriptExecutionContext() const;
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
 
     PassRefPtr<MemoryInfo> memory() const;
     PerformanceNavigation* navigation() const;
     PerformanceTiming* timing() const;
     double now() const;
 
     Vector<RefPtr<PerformanceEntry> > getEntries() const;
     Vector<RefPtr<PerformanceEntry> > getEntriesByType(const String& entryType);
     Vector<RefPtr<PerformanceEntry> > getEntriesByName(const String& name, const String& entryType);
 
     void webkitClearResourceTimings();
     void webkitSetResourceTimingBufferSize(unsigned int);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitresourcetimingbufferfull);
 
     void addResourceTiming(const ResourceTimingInfo&, Document*);
 
     using RefCounted<Performance>::ref;
     using RefCounted<Performance>::deref;
 
     void mark(const String& markName, ExceptionState&);
     void clearMarks(const String& markName);
 
     void measure(const String& measureName, const String& startMark, const String& endMark, ExceptionState&);
     void clearMeasures(const String& measureName);
 
 private:
     explicit Performance(Frame*);
 
-    virtual void refEventTarget() { ref(); }
-    virtual void derefEventTarget() { deref(); }
-    virtual EventTargetData* eventTargetData();
-    virtual EventTargetData* ensureEventTargetData();
+    virtual void refEventTarget() OVERRIDE { ref(); }
+    virtual void derefEventTarget() OVERRIDE { deref(); }
+
     bool isResourceTimingBufferFull();
     void addResourceTimingBuffer(PassRefPtr<PerformanceEntry>);
 
-    EventTargetData m_eventTargetData;
-
     mutable RefPtr<PerformanceNavigation> m_navigation;
     mutable RefPtr<PerformanceTiming> m_timing;
 
     Vector<RefPtr<PerformanceEntry> > m_resourceTimingBuffer;
     unsigned m_resourceTimingBufferSize;
     double m_referenceTime;
 
     RefPtr<UserTiming> m_userTiming;
 };
 
 }
 
 #endif // Performance_h