Update accessibility classes to use OVERRIDE / FINAL when needed

Source/core/accessibility/AXScrollbar.h

 /*
  * Copyright (C) 2010 Apple 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 17 matching lines @@
 
 #ifndef AXScrollbar_h
 #define AXScrollbar_h
 
 #include "core/accessibility/AXMockObject.h"
 
 namespace WebCore {
 
 class Scrollbar;
 
-class AXScrollbar : public AXMockObject {
+class AXScrollbar FINAL : public AXMockObject {
 public:
     static PassRefPtr<AXScrollbar> create(Scrollbar*);
 
     Scrollbar* scrollbar() const { return m_scrollbar.get(); }
 
 private:
     explicit AXScrollbar(Scrollbar*);
 
-    virtual void detachFromParent();
+    virtual void detachFromParent() OVERRIDE;
 
     virtual bool canSetValueAttribute() const OVERRIDE { return true; }
 
     virtual bool isAXScrollbar() const OVERRIDE { return true; }
     virtual LayoutRect elementRect() const OVERRIDE;
 
     virtual AccessibilityRole roleValue() const OVERRIDE { return ScrollBarRole; }
     virtual AccessibilityOrientation orientation() const OVERRIDE;
     virtual Document* document() const OVERRIDE;
 
     virtual bool isEnabled() const OVERRIDE;
 
     // Assumes float [0..1]
     virtual void setValue(float) OVERRIDE;
     virtual float valueForRange() const OVERRIDE;
 
     RefPtr<Scrollbar> m_scrollbar;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXScrollbar, isAXScrollbar());
 
 } // namespace WebCore
 
 #endif // AXScrollbar_h