Update DOM classes to use OVERRIDE / FINAL when needed

Source/core/dom/WheelController.h

 /*
  * Copyright (C) 2013 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/dom/DocumentSupplementable.h"
 #include "core/events/Event.h"
 #include "core/frame/DOMWindowLifecycleObserver.h"
 
 
 namespace WebCore {
 
 class DOMWindow;
 
-class WheelController : public DocumentSupplement, public DOMWindowLifecycleObserver {
+class WheelController FINAL : public DocumentSupplement, public DOMWindowLifecycleObserver {
 
 public:
     virtual ~WheelController();
 
     static const char* supplementName();
     static WheelController* from(Document*);
 
     unsigned wheelEventHandlerCount() { return m_wheelEventHandlerCount; }
 
     void didAddWheelEventHandler(Document*);
     void didRemoveWheelEventHandler(Document*);
 
     // Inherited from DOMWindowLifecycleObserver
     virtual void didAddEventListener(DOMWindow*, const AtomicString&) OVERRIDE;
     virtual void didRemoveEventListener(DOMWindow*, const AtomicString&) OVERRIDE;
 
 private:
     explicit WheelController(Document*);
 
     unsigned m_wheelEventHandlerCount;
 };
 
 } // namespace WebCore
 
 #endif // WheelController_h