Update web classes to use OVERRIDE / FINAL when needed

Source/web/ValidationMessageClientImpl.h

 /*
  * Copyright (C) 2012 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 21 matching lines @@
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 class FrameView;
 }
 
 namespace blink {
 
 class WebViewImpl;
 
-class ValidationMessageClientImpl : public WebCore::ValidationMessageClient {
+class ValidationMessageClientImpl FINAL : public WebCore::ValidationMessageClient {
 public:
     static PassOwnPtr<ValidationMessageClientImpl> create(WebViewImpl&);
     virtual ~ValidationMessageClientImpl();
 
 private:
     ValidationMessageClientImpl(WebViewImpl&);
     void checkAnchorStatus(WebCore::Timer<ValidationMessageClientImpl>*);
     WebCore::FrameView* currentView();
 
     virtual void showValidationMessage(const WebCore::Element& anchor, const String& message) OVERRIDE;
     virtual void hideValidationMessage(const WebCore::Element& anchor) OVERRIDE;
     virtual bool isValidationMessageVisible(const WebCore::Element& anchor) OVERRIDE;
     virtual void documentDetached(const WebCore::Document&) OVERRIDE;
 
     WebViewImpl& m_webView;
     const WebCore::Element* m_currentAnchor;
     String m_message;
     WebCore::IntRect m_lastAnchorRectInScreen;
     float m_lastPageScaleFactor;
     double m_finishTime;
     WebCore::Timer<ValidationMessageClientImpl> m_timer;
 };
 
 }
 
 #endif