Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/graphics/ImageDecodingStore.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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 179 matching lines @@
         const ImageFrameGenerator* m_generator;
         int m_useCount;
         bool m_isDiscardable;
         bool m_isAccountingEnabled;
 
     private:
         CacheEntry* m_prev;
         CacheEntry* m_next;
     };
 
-    class ImageCacheEntry : public CacheEntry {
+    class ImageCacheEntry FINAL : public CacheEntry {
     public:
         static PassOwnPtr<ImageCacheEntry> createAndUse(const ImageFrameGenerator* generator, PassOwnPtr<ScaledImageFragment> image)
         {
             return adoptPtr(new ImageCacheEntry(generator, 1, image));
         }
 
         ImageCacheEntry(const ImageFrameGenerator* generator, int count, PassOwnPtr<ScaledImageFragment> image)
             : CacheEntry(generator, count, DiscardablePixelRef::isDiscardable(image->bitmap().pixelRef()))
             , m_cachedImage(image)
         {
         }
 
         // FIXME: getSafeSize() returns size in bytes truncated to a 32-bits integer.
         //        Find a way to get the size in 64-bits.
-        virtual size_t memoryUsageInBytes() const { return cachedImage()->bitmap().getSafeSize(); }
-        virtual CacheType type() const { return TypeImage; }
+        virtual size_t memoryUsageInBytes() const OVERRIDE { return cachedImage()->bitmap().getSafeSize(); }
+        virtual CacheType type() const OVERRIDE { return TypeImage; }
 
         static ImageCacheKey makeCacheKey(const ImageFrameGenerator* generator, const SkISize& size, size_t index, size_t generation)
         {
             return std::make_pair(std::make_pair(generator, size), std::make_pair(index, generation));
         }
         ImageCacheKey cacheKey() const { return makeCacheKey(m_generator, m_cachedImage->scaledSize(), m_cachedImage->index(), m_cachedImage->generation()); }
         const ScaledImageFragment* cachedImage() const { return m_cachedImage.get(); }
         ScaledImageFragment* cachedImage() { return m_cachedImage.get(); }
 
     private:
         OwnPtr<ScaledImageFragment> m_cachedImage;
     };
 
-    class DecoderCacheEntry : public CacheEntry {
+    class DecoderCacheEntry FINAL : public CacheEntry {
     public:
         static PassOwnPtr<DecoderCacheEntry> create(const ImageFrameGenerator* generator, PassOwnPtr<ImageDecoder> decoder, bool isDiscardable)
         {
             return adoptPtr(new DecoderCacheEntry(generator, 0, decoder, isDiscardable));
         }
 
         DecoderCacheEntry(const ImageFrameGenerator* generator, int count, PassOwnPtr<ImageDecoder> decoder, bool isDiscardable)
             : CacheEntry(generator, count, isDiscardable)
             , m_cachedDecoder(decoder)
             , m_size(SkISize::Make(m_cachedDecoder->decodedSize().width(), m_cachedDecoder->decodedSize().height()))
         {
         }
 
-        virtual size_t memoryUsageInBytes() const { return m_size.width() * m_size.height() * 4; }
-        virtual CacheType type() const { return TypeDecoder; }
+        virtual size_t memoryUsageInBytes() const OVERRIDE { return m_size.width() * m_size.height() * 4; }
+        virtual CacheType type() const OVERRIDE { return TypeDecoder; }
 
         static DecoderCacheKey makeCacheKey(const ImageFrameGenerator* generator, const SkISize& size)
         {
             return std::make_pair(generator, size);
         }
         static DecoderCacheKey makeCacheKey(const ImageFrameGenerator* generator, const ImageDecoder* decoder)
         {
             return std::make_pair(generator, SkISize::Make(decoder->decodedSize().width(), decoder->decodedSize().height()));
         }
         DecoderCacheKey cacheKey() const { return makeCacheKey(m_generator, m_size); }
@@ skipping 77 matching lines @@
     //   m_cacheLimitInBytes
     //   m_memoryUsageInBytes
     // This mutex also protects calls to underlying skBitmap's
     // lockPixels()/unlockPixels() as they are not threadsafe.
     Mutex m_mutex;
 };
 
 } // namespace WebCore
 
 #endif