Reduce repetitive EventTarget subclassing

Source/modules/indexeddb/IDBTransaction.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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 31 matching lines @@
 
 class DOMError;
 class ExceptionState;
 class IDBCursor;
 class IDBDatabase;
 class IDBDatabaseBackendInterface;
 class IDBObjectStore;
 class IDBOpenDBRequest;
 struct IDBObjectStoreMetadata;
 
-class IDBTransaction : public ScriptWrappable, public RefCounted<IDBTransaction>, public EventTarget, public ActiveDOMObject {
+class IDBTransaction : public ScriptWrappable, public RefCounted<IDBTransaction>, public EventTargetWithInlineData, public ActiveDOMObject {
 public:
     static PassRefPtr<IDBTransaction> create(ScriptExecutionContext*, int64_t, const Vector<String>& objectStoreNames, IndexedDB::TransactionMode, IDBDatabase*);
     static PassRefPtr<IDBTransaction> create(ScriptExecutionContext*, int64_t, IDBDatabase*, IDBOpenDBRequest*, const IDBDatabaseMetadata& previousMetadata);
     virtual ~IDBTransaction();
 
     static const AtomicString& modeReadOnly();
     static const AtomicString& modeReadWrite();
     static const AtomicString& modeVersionChange();
     static const AtomicString& modeReadOnlyLegacy();
     static const AtomicString& modeReadWriteLegacy();
@@ skipping 24 matching lines @@
     void setError(PassRefPtr<DOMError>);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(abort);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(complete);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
 
     virtual void onAbort(PassRefPtr<DOMError>);
     virtual void onComplete();
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const;
-    virtual ScriptExecutionContext* scriptExecutionContext() const;
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
 
     using EventTarget::dispatchEvent;
     virtual bool dispatchEvent(PassRefPtr<Event>) OVERRIDE;
 
     // ActiveDOMObject
     virtual bool hasPendingActivity() const OVERRIDE;
     virtual bool canSuspend() const OVERRIDE;
     virtual void stop() OVERRIDE;
 
     using RefCounted<IDBTransaction>::ref;
     using RefCounted<IDBTransaction>::deref;
 
 private:
     IDBTransaction(ScriptExecutionContext*, int64_t, const Vector<String>&, IndexedDB::TransactionMode, IDBDatabase*, IDBOpenDBRequest*, const IDBDatabaseMetadata&);
 
     void enqueueEvent(PassRefPtr<Event>);
 
     // EventTarget
-    virtual void refEventTarget() { ref(); }
-    virtual void derefEventTarget() { deref(); }
-    virtual EventTargetData* eventTargetData();
-    virtual EventTargetData* ensureEventTargetData();
+    virtual void refEventTarget() OVERRIDE { ref(); }
+    virtual void derefEventTarget() OVERRIDE { deref(); }
 
     enum State {
         Inactive, // Created or started, but not in an event callback
         Active, // Created or started, in creation scope or an event callback
         Finishing, // In the process of aborting or completing.
         Finished, // No more events will fire and no new requests may be filed.
     };
 
     int64_t m_id;
     RefPtr<IDBDatabase> m_database;
     const Vector<String> m_objectStoreNames;
     IDBOpenDBRequest* m_openDBRequest;
     const IndexedDB::TransactionMode m_mode;
     State m_state;
     bool m_hasPendingActivity;
     bool m_contextStopped;
     RefPtr<DOMError> m_error;
 
     ListHashSet<RefPtr<IDBRequest> > m_requestList;
 
     typedef HashMap<String, RefPtr<IDBObjectStore> > IDBObjectStoreMap;
     IDBObjectStoreMap m_objectStoreMap;
 
     typedef HashSet<RefPtr<IDBObjectStore> > IDBObjectStoreSet;
     IDBObjectStoreSet m_deletedObjectStores;
 
     typedef HashMap<RefPtr<IDBObjectStore>, IDBObjectStoreMetadata> IDBObjectStoreMetadataMap;
     IDBObjectStoreMetadataMap m_objectStoreCleanupMap;
     IDBDatabaseMetadata m_previousMetadata;
-
-    EventTargetData m_eventTargetData;
 };
 
 } // namespace WebCore
 
 #endif // IDBTransaction_h