Update accessibility classes to use OVERRIDE / FINAL when needed

Source/core/accessibility/AXTableColumn.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 18 matching lines @@
 #ifndef AXTableColumn_h
 #define AXTableColumn_h
 
 #include "core/accessibility/AXMockObject.h"
 #include "core/accessibility/AXTable.h"
 
 namespace WebCore {
 
 class RenderTableSection;
 
-class AXTableColumn : public AXMockObject {
+class AXTableColumn FINAL : public AXMockObject {
 
 private:
     AXTableColumn();
 public:
     static PassRefPtr<AXTableColumn> create();
     virtual ~AXTableColumn();
 
     AXObject* headerObject();
 
     virtual AccessibilityRole roleValue() const OVERRIDE { return ColumnRole; }
@@ skipping 13 matching lines @@
     virtual bool isTableCol() const OVERRIDE { return true; }
     AXObject* headerObjectForSection(RenderTableSection*, bool thTagRequired);
     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXTableColumn, isTableCol());
 
 } // namespace WebCore
 
 #endif // AXTableColumn_h