Update web classes to use OVERRIDE / FINAL when needed

Source/web/BackForwardClientImpl.h

 /*
  * Copyright (C) 2009 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
@@ skipping 18 matching lines @@
  */
 
 #ifndef BackForwardClientImpl_h
 #define BackForwardClientImpl_h
 
 #include "core/page/BackForwardClient.h"
 
 namespace blink {
 class WebViewImpl;
 
-class BackForwardClientImpl : public WebCore::BackForwardClient {
+class BackForwardClientImpl FINAL : public WebCore::BackForwardClient {
 public:
     explicit BackForwardClientImpl(WebViewImpl*);
     virtual ~BackForwardClientImpl();
 
 private:
     // WebCore::BackForwardList methods:
-    virtual int backListCount();
-    virtual int forwardListCount();
-    virtual int backForwardListCount();
+    virtual int backListCount() OVERRIDE;
+    virtual int forwardListCount() OVERRIDE;
+    virtual int backForwardListCount() OVERRIDE;
 
     WebViewImpl* m_webView;
 };
 
 } // namespace blink
 
 #endif