Reduce repetitive EventTarget subclassing

Source/modules/filesystem/FileWriter.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 "public/platform/WebFileWriterClient.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class Blob;
 class ExceptionState;
 class ScriptExecutionContext;
 
-class FileWriter : public ScriptWrappable, public FileWriterBase, public ActiveDOMObject, public EventTarget, public WebKit::WebFileWriterClient {
+class FileWriter : public ScriptWrappable, public FileWriterBase, public ActiveDOMObject, public EventTargetWithInlineData, public WebKit::WebFileWriterClient {
 public:
     static PassRefPtr<FileWriter> create(ScriptExecutionContext*);
 
     enum ReadyState {
         INIT = 0,
         WRITING = 1,
         DONE = 2
     };
 
     void write(Blob*, ExceptionState&);
     void seek(long long position, ExceptionState&);
     void truncate(long long length, ExceptionState&);
     void abort(ExceptionState&);
     ReadyState readyState() const { return m_readyState; }
     FileError* error() const { return m_error.get(); }
 
     // WebFileWriterClient
     virtual void didWrite(long long bytes, bool complete) OVERRIDE;
     virtual void didTruncate() OVERRIDE;
     virtual void didFail(WebKit::WebFileError) OVERRIDE;
 
     // ActiveDOMObject
     virtual bool canSuspend() const;
     virtual void stop();
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const;
-    virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE { return ActiveDOMObject::scriptExecutionContext(); }
 
     using RefCounted<FileWriterBase>::ref;
     using RefCounted<FileWriterBase>::deref;
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(writestart);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(write);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend);
 
 private:
     enum Operation {
         OperationNone,
         OperationWrite,
         OperationTruncate,
         OperationAbort
     };
 
     FileWriter(ScriptExecutionContext*);
 
     virtual ~FileWriter();
 
     // 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 completeAbort();
 
     void doOperation(Operation);
 
     void signalCompletion(FileError::ErrorCode);
 
     void fireEvent(const AtomicString& type);
 
     void setError(FileError::ErrorCode, ExceptionState&);
 
     RefPtr<FileError> m_error;
-    EventTargetData m_eventTargetData;
     ReadyState m_readyState;
     Operation m_operationInProgress;
     Operation m_queuedOperation;
     long long m_bytesWritten;
     long long m_bytesToWrite;
     long long m_truncateLength;
     long long m_numAborts;
     long long m_recursionDepth;
     double m_lastProgressNotificationTimeMS;
     RefPtr<Blob> m_blobBeingWritten;
 };
 
 } // namespace WebCore
 
 #endif // FileWriter_h