Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/graphics/LazyDecodingPixelRef.h

 /*
  * Copyright (C) 2012 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 27 matching lines @@
 
 using skia::LazyPixelRef;
 
 class SkData;
 
 namespace WebCore {
 
 class ImageFrameGenerator;
 class ScaledImageFragment;
 
-class LazyDecodingPixelRef : public LazyPixelRef {
+class LazyDecodingPixelRef FINAL : public LazyPixelRef {
 public:
     LazyDecodingPixelRef(const SkImageInfo&, PassRefPtr<ImageFrameGenerator>, size_t index);
     virtual ~LazyDecodingPixelRef();
 
     SK_DECLARE_UNFLATTENABLE_OBJECT()
 
     PassRefPtr<ImageFrameGenerator> frameGenerator() const { return m_frameGenerator; }
     size_t frameIndex() const { return m_frameIndex; }
 
     // Returns true if the image might already be decoded in the cache.
     // Optimistic version of PrepareToDecode; requires less locking.
-    virtual bool MaybeDecoded();
-    virtual bool PrepareToDecode(const LazyPixelRef::PrepareParams&);
-    virtual void Decode();
+    virtual bool MaybeDecoded() OVERRIDE;
+    virtual bool PrepareToDecode(const LazyPixelRef::PrepareParams&) OVERRIDE;
+    virtual void Decode() OVERRIDE;
 
 protected:
     // SkPixelRef implementation.
-    virtual void* onLockPixels(SkColorTable**);
-    virtual void onUnlockPixels();
-    virtual bool onLockPixelsAreWritable() const;
+    virtual void* onLockPixels(SkColorTable**) OVERRIDE;
+    virtual void onUnlockPixels() OVERRIDE;
+    virtual bool onLockPixelsAreWritable() const OVERRIDE;
 
     virtual SkData* onRefEncodedData() SK_OVERRIDE;
 
 private:
     RefPtr<ImageFrameGenerator> m_frameGenerator;
     size_t m_frameIndex;
 
     const ScaledImageFragment* m_lockedImageResource;
     PlatformInstrumentation::LazyPixelRefTracker m_objectTracker;
 };
 
 } // namespace WebCore
 
 #endif // LazyDecodingPixelRef_h_