Reduce repetitive EventTarget subclassing

Source/modules/notifications/Notification.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009, 2011, 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 149 matching lines @@
     case Idle:
         break;
     case Showing:
         m_notificationClient->cancel(this);
         break;
     case Closed:
         break;
     }
 }
 
-EventTargetData* Notification::eventTargetData()
-{
-    return &m_eventTargetData;
-}
-
-EventTargetData* Notification::ensureEventTargetData()
-{
-    return &m_eventTargetData;
-}
-
 void Notification::contextDestroyed()
 {
     ActiveDOMObject::contextDestroyed();
     m_notificationClient->notificationObjectDestroyed(this);
 }
 
 void Notification::finalize()
 {
     if (m_state == Closed)
         return;
@@ skipping 68 matching lines @@
     return deniedPermission;
 }
 
 void Notification::requestPermission(ScriptExecutionContext* context, PassRefPtr<NotificationPermissionCallback> callback)
 {
     ASSERT(toDocument(context)->page());
     NotificationController::from(toDocument(context)->page())->client()->requestPermission(context, callback);
 }
 
 } // namespace WebCore