Update HTML canvas classes to use OVERRIDE / FINAL when needed

Source/core/html/canvas/WebGLSharedObject.h

 /*
  * Copyright (C) 2011 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 
 // WebGLSharedObject the base class for objects that can be shared by multiple
 // WebGLRenderingContexts.
 class WebGLSharedObject : public WebGLObject {
 public:
     virtual ~WebGLSharedObject();
 
     WebGLContextGroup* contextGroup() const { return m_contextGroup; }
 
     virtual bool isBuffer() const { return false; }
-    virtual bool isFramebuffer() const { return false; }
     virtual bool isProgram() const { return false; }
     virtual bool isRenderbuffer() const { return false; }
     virtual bool isShader() const { return false; }
     virtual bool isTexture() const { return false; }
 
-    virtual bool validate(const WebGLContextGroup* contextGroup, const WebGLRenderingContext*) const
+    virtual bool validate(const WebGLContextGroup* contextGroup, const WebGLRenderingContext*) const OVERRIDE FINAL
     {
         return contextGroup == m_contextGroup;
     }
 
     void detachContextGroup();
 
 protected:
     WebGLSharedObject(WebGLRenderingContext*);
 
-    virtual bool hasGroupOrContext() const
+    virtual bool hasGroupOrContext() const OVERRIDE FINAL
     {
         return m_contextGroup;
     }
 
-    virtual GraphicsContext3D* getAGraphicsContext3D() const;
+    virtual GraphicsContext3D* getAGraphicsContext3D() const OVERRIDE FINAL;
 
 private:
     WebGLContextGroup* m_contextGroup;
 };
 
 } // namespace WebCore
 
 #endif // WebGLSharedObject_h