Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/image-decoders/bmp/BMPImageDecoder.h

 /*
  * Copyright (c) 2008, 2009, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
 // This class decodes the BMP image format.
 class PLATFORM_EXPORT BMPImageDecoder : public ImageDecoder {
 public:
     BMPImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes);
 
     // ImageDecoder
-    virtual String filenameExtension() const { return "bmp"; }
-    virtual void setData(SharedBuffer*, bool allDataReceived);
-    virtual bool isSizeAvailable();
-    virtual ImageFrame* frameBufferAtIndex(size_t);
+    virtual String filenameExtension() const OVERRIDE { return "bmp"; }
+    virtual void setData(SharedBuffer*, bool allDataReceived) OVERRIDE;
+    virtual bool isSizeAvailable() OVERRIDE;
+    virtual ImageFrame* frameBufferAtIndex(size_t) OVERRIDE;
     // CAUTION: setFailed() deletes |m_reader|.  Be careful to avoid
     // accessing deleted memory, especially when calling this from inside
     // BMPImageReader!
-    virtual bool setFailed();
+    virtual bool setFailed() OVERRIDE;
 
 private:
     inline uint32_t readUint32(int offset) const
     {
         return BMPImageReader::readUint32(m_data.get(), m_decodedOffset + offset);
     }
 
     // Decodes the image.  If |onlySize| is true, stops decoding after
     // calculating the image size.  If decoding fails but there is no more
     // data coming, sets the "decode failure" flag.
@@ skipping 13 matching lines @@
     // BMPImageReader takes over this will not be updated further.
     size_t m_decodedOffset;
 
     // The reader used to do most of the BMP decoding.
     OwnPtr<BMPImageReader> m_reader;
 };
 
 } // namespace WebCore
 
 #endif