Update HTML classes to use OVERRIDE / FINAL when needed

Source/core/html/HTMLCanvasElement.h

 /*
  * Copyright (C) 2004, 2006, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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.
@@ skipping 105 matching lines @@
     bool originClean() const { return m_originClean; }
 
     AffineTransform baseTransform() const;
 
     bool is3D() const;
 
     bool hasImageBuffer() const { return m_imageBuffer.get(); }
 
     bool shouldAccelerate(const IntSize&) const;
 
-    InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
+    virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
 
 private:
     explicit HTMLCanvasElement(Document&);
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
-    virtual RenderObject* createRenderer(RenderStyle*);
+    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }
 
     void reset();
 
     PassOwnPtr<ImageBufferSurface> createImageBufferSurface(const IntSize& deviceSize, int* msaaSampleCount);
     void createImageBuffer();
     void clearImageBuffer();
 
     void setSurfaceSize(const IntSize&);
 
@@ skipping 26 matching lines @@
 
     mutable RefPtr<Image> m_presentedImage;
     mutable RefPtr<Image> m_copiedImage; // FIXME: This is temporary for platforms that have to copy the image buffer to render (and for CSSCanvasValue).
 };
 
 DEFINE_NODE_TYPE_CASTS(HTMLCanvasElement, hasTagName(HTMLNames::canvasTag));
 
 } //namespace
 
 #endif