Update remaining core classes to use OVERRIDE / FINAL when needed

Source/core/testing/MockPagePopupDriver.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
@@ skipping 20 matching lines @@
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class Frame;
 class IntRect;
 class MockPagePopup;
 class PagePopup;
 class PagePopupController;
 
-class MockPagePopupDriver : public PagePopupDriver {
+class MockPagePopupDriver FINAL : public PagePopupDriver {
 public:
     static PassOwnPtr<MockPagePopupDriver> create(Frame* mainFrame);
     virtual ~MockPagePopupDriver();
     PagePopupController* pagePopupController() { return m_pagePopupController.get(); }
 
 private:
     MockPagePopupDriver(Frame* mainFrame);
 
     // PagePopupDriver functions:
     virtual PagePopup* openPagePopup(PagePopupClient*, const IntRect& originBoundsInRootView) OVERRIDE;
     virtual void closePagePopup(PagePopup*) OVERRIDE;
 
     RefPtr<MockPagePopup> m_mockPagePopup;
     Frame* m_mainFrame;
     RefPtr<PagePopupController> m_pagePopupController;
 };
 
 }
 #endif