Update Event classes to use OVERRIDE / FINAL when needed

Source/core/events/GenericEventQueue.h

 /*
  * Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/events/EventQueue.h"
 #include "core/events/EventTarget.h"
 #include "platform/Timer.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
-class GenericEventQueue : public EventQueue {
+class GenericEventQueue FINAL : public EventQueue {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     explicit GenericEventQueue(EventTarget*);
     static PassOwnPtr<GenericEventQueue> create(EventTarget*);
     virtual ~GenericEventQueue();
 
     // EventQueue
     virtual bool enqueueEvent(PassRefPtr<Event>) OVERRIDE;
     virtual bool cancelEvent(Event*) OVERRIDE;
     virtual void close() OVERRIDE;
 
     void cancelAllEvents();
     bool hasPendingEvents() const;
 
 private:
     void timerFired(Timer<GenericEventQueue>*);
 
     EventTarget* m_owner;
     Vector<RefPtr<Event> > m_pendingEvents;
     Timer<GenericEventQueue> m_timer;
 
     bool m_isClosed;
 };
 
 }
 
 #endif