Update HTML canvas classes to use OVERRIDE / FINAL when needed

Source/core/html/canvas/WebGLCompressedTextureATC.h

 /*
  * Copyright (C) 2013 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 16 matching lines @@
 #define WebGLCompressedTextureATC_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/html/canvas/WebGLExtension.h"
 #include "wtf/PassRefPtr.h"
 
 namespace WebCore {
 
 class WebGLTexture;
 
-class WebGLCompressedTextureATC : public WebGLExtension, public ScriptWrappable {
+class WebGLCompressedTextureATC FINAL : public WebGLExtension, public ScriptWrappable {
 public:
     static PassRefPtr<WebGLCompressedTextureATC> create(WebGLRenderingContext*);
     static bool supported(WebGLRenderingContext*);
     static const char* extensionName();
 
     virtual ~WebGLCompressedTextureATC();
-    virtual ExtensionName name() const;
+    virtual ExtensionName name() const OVERRIDE;
 
 private:
     WebGLCompressedTextureATC(WebGLRenderingContext*);
 };
 
 } // namespace WebCore
 
 #endif // WebGLCompressedTextureATC_h