Update accessibility classes to use OVERRIDE / FINAL when needed

Source/core/accessibility/AXList.h

 /*
  * Copyright (C) 2008 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 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AXList_h
 #define AXList_h
 
 #include "core/accessibility/AXRenderObject.h"
 
 namespace WebCore {
 
-class AXList : public AXRenderObject {
+class AXList FINAL : public AXRenderObject {
 
 private:
     explicit AXList(RenderObject*);
 public:
     static PassRefPtr<AXList> create(RenderObject*);
     virtual ~AXList();
 
-    virtual bool isList() const { return true; }
+    virtual bool isList() const OVERRIDE { return true; }
     bool isUnorderedList() const;
     bool isOrderedList() const;
     bool isDescriptionList() const;
 
-    virtual AccessibilityRole roleValue() const { return ListRole; }
+    virtual AccessibilityRole roleValue() const OVERRIDE { return ListRole; }
 private:
-    virtual bool computeAccessibilityIsIgnored() const;
+    virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
 };
 
 } // namespace WebCore
 
 #endif // AXList_h