Allowing YUV data to be retrieved from the JPEG Decoder.

Source/platform/graphics/test/MockImageDecoder.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 26 matching lines @@
     virtual ImageFrame::Status status() = 0;
     virtual size_t frameCount() = 0;
     virtual int repetitionCount() const = 0;
     virtual float frameDuration() const = 0;
 
     // Clients can control the behavior of MockImageDecoder::decodedSize() by
     // overriding this method. The default implementation causes
     // MockImageDecoder::decodedSize() to return the same thing as
     // MockImageDecoder::size(). See the precise implementation of
     // MockImageDecoder::decodedSize() below.
-    virtual IntSize decodedSize() const { return IntSize(); }
+    virtual IntSize decodedSize(int component = 0) const { return IntSize(); }
 };
 
 class MockImageDecoder : public ImageDecoder {
 public:
     static PassOwnPtr<MockImageDecoder> create(MockImageDecoderClient* client) { return adoptPtr(new MockImageDecoder(client)); }
 
     MockImageDecoder(MockImageDecoderClient* client)
         : ImageDecoder(ImageSource::AlphaPremultiplied, ImageSource::GammaAndColorProfileApplied, noDecodedImageByteLimit)
         , m_client(client)
     { }
 
     ~MockImageDecoder()
     {
         m_client->decoderBeingDestroyed();
     }
 
-    virtual IntSize decodedSize() const OVERRIDE
+    virtual IntSize decodedSize(int component = 0) const OVERRIDE
     {
-        return m_client->decodedSize().isEmpty() ? size() : m_client->decodedSize();
+        return m_client->decodedSize(component).isEmpty() ? size() : m_client->decodedSize(component);
     }
 
     virtual bool setSize(unsigned width, unsigned height) OVERRIDE
     {
         ImageDecoder::setSize(width, height);
         m_frameBufferCache.resize(1);
         m_frameBufferCache[0].setSize(width, height);
         return true;
     }
 
@@ skipping 63 matching lines @@
     {
     }
 
     MockImageDecoderClient* m_client;
     IntSize m_decodedSize;
 };
 
 } // namespace blink
 
 #endif // MockImageDecoder_h