Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/graphics/BitmapImage.h

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2008-2009 Torch Mobile, Inc.
  *
  * 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 135 matching lines @@
     // a bunch of animation frames, so we should not do things like decode each
     // one or notify our observers.
     // Returns whether the animation was advanced.
     bool internalAdvanceAnimation(bool skippingFrames);
 
     // Checks to see if the image is a 1x1 solid color.  We optimize these images and just do a fill rect instead.
     // This check should happen regardless whether m_checkedForSolidColor is already set, as the frame may have
     // changed.
     void checkForSolidColor();
 
-    virtual bool mayFillWithSolidColor();
-    virtual Color solidColor() const;
+    virtual bool mayFillWithSolidColor() OVERRIDE;
+    virtual Color solidColor() const OVERRIDE;
 
     ImageSource m_source;
     mutable IntSize m_size; // The size to use for the overall image (will just be the size of the first image).
     mutable IntSize m_sizeRespectingOrientation;
 
     size_t m_currentFrame; // The index of the current frame of animation.
     Vector<FrameData, 1> m_frames; // An array of the cached frames of the animation. We have to ref frames to pin them in the cache.
 
     Timer<BitmapImage>* m_frameTimer;
     int m_repetitionCount; // How many total animation loops we should do.  This will be cAnimationNone if this image type is incapable of animation.
@@ skipping 15 matching lines @@
     bool m_sizeAvailable : 1; // Whether or not we can obtain the size of the first image frame yet from ImageIO.
     mutable bool m_hasUniformFrameSize : 1;
     mutable bool m_haveFrameCount : 1;
 };
 
 DEFINE_IMAGE_TYPE_CASTS(BitmapImage);
 
 }
 
 #endif