Update more core classes to use OVERRIDE / FINAL when needed

Source/core/frame/DOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 93 matching lines @@
 #include "wtf/MainThread.h"
 #include "wtf/MathExtras.h"
 #include "wtf/text/WTFString.h"
 #include <algorithm>
 
 using std::min;
 using std::max;
 
 namespace WebCore {
 
-class PostMessageTimer : public TimerBase {
+class PostMessageTimer FINAL : public TimerBase {
 public:
     PostMessageTimer(DOMWindow* window, PassRefPtr<SerializedScriptValue> message, const String& sourceOrigin, PassRefPtr<DOMWindow> source, PassOwnPtr<MessagePortChannelArray> channels, SecurityOrigin* targetOrigin, PassRefPtr<ScriptCallStack> stackTrace)
         : m_window(window)
         , m_message(message)
         , m_origin(sourceOrigin)
         , m_source(source)
         , m_channels(channels)
         , m_targetOrigin(targetOrigin)
         , m_stackTrace(stackTrace)
     {
     }
 
     PassRefPtr<MessageEvent> event()
     {
         return MessageEvent::create(m_channels.release(), m_message, m_origin, String(), m_source);
 
     }
     SecurityOrigin* targetOrigin() const { return m_targetOrigin.get(); }
     ScriptCallStack* stackTrace() const { return m_stackTrace.get(); }
 
 private:
-    virtual void fired()
+    virtual void fired() OVERRIDE
     {
         m_window->postMessageTimerFired(adoptPtr(this));
         // This object is deleted now.
     }
 
     RefPtr<DOMWindow> m_window;
     RefPtr<SerializedScriptValue> m_message;
     String m_origin;
     RefPtr<DOMWindow> m_source;
     OwnPtr<MessagePortChannelArray> m_channels;
@@ skipping 1718 matching lines @@
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<DOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<DOMWindow> > DOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 
 } // namespace WebCore