Allowing YUV data to be retrieved from the JPEG Decoder.

Source/platform/graphics/ImageFrameGenerator.h

Index: Source/platform/graphics/ImageFrameGenerator.h
diff --git a/Source/platform/graphics/ImageFrameGenerator.h b/Source/platform/graphics/ImageFrameGenerator.h
index 720b63b8d66a9a6a4e70e92e12e87e24a101c58a..94cf02d0a86bd811745af9a0bdddeaa3de102584 100644
--- a/Source/platform/graphics/ImageFrameGenerator.h
+++ b/Source/platform/graphics/ImageFrameGenerator.h
@@ -41,6 +41,7 @@
 
 namespace blink {
 
+class DecodingBuffers;
 class ImageDecoder;
 class ScaledImageFragment;
 class SharedBuffer;
@@ -73,6 +74,9 @@ public:
     // Returns true if decoding was successful.
     bool decodeAndScale(const SkImageInfo&, size_t index, void* pixels, size_t rowBytes);
 
+    // Decodes components directly into the provided memory planes.
+    bool decodeAndScale(void* planes[3], size_t rowBytes[3]);
+
     void setData(PassRefPtr<SharedBuffer>, bool allDataReceived);
 
     // Creates a new SharedBuffer containing the data received so far.
@@ -85,6 +89,9 @@ public:
     // FIXME: Return alpha state for each frame.
     bool hasAlpha(size_t);
 
+    // Returns sizes for the first 3 components of an image (could be RGB, YUV, etc)
+    bool getComponentSizes(SkISize componentSizes[3]);
+
 private:
     class ExternalMemoryAllocator;
     friend class ImageFrameGeneratorTest;
@@ -111,6 +118,8 @@ private:
     ThreadSafeDataTransport m_data;
     bool m_isMultiFrame;
     bool m_decodeFailedAndEmpty;
+    bool m_acceleratedYUVDecoding;
+    OwnPtr<DecodingBuffers> m_decodingBuffers;
     Vector<bool> m_hasAlpha;
     size_t m_decodeCount;
     OwnPtr<SkBitmap::Allocator> m_discardableAllocator;