Allowing YUV data to be retrieved from the JPEG Decoder.

Source/platform/graphics/DecodingImageGenerator.cpp

Index: Source/platform/graphics/DecodingImageGenerator.cpp
diff --git a/Source/platform/graphics/DecodingImageGenerator.cpp b/Source/platform/graphics/DecodingImageGenerator.cpp
index e74a7fec18d17642e0a0cd5ed04326e26a115b7f..ff2b289f46c6e62ed7a8eeba8cdca77a12a98d98 100644
--- a/Source/platform/graphics/DecodingImageGenerator.cpp
+++ b/Source/platform/graphics/DecodingImageGenerator.cpp
@@ -82,4 +82,17 @@ bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels,
     return decoded;
 }
 
+bool DecodingImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3])
+{
+    if (!planes || !planes[0]) {
+        return m_frameGenerator->getComponentSizes(sizes);
+    }
+
+    TRACE_EVENT0("blink", "DecodingImageGenerator::onGetYUV8Planes");
+    PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId);
+    bool decoded = m_frameGenerator->decodeAndScale(planes, rowBytes);
+    PlatformInstrumentation::didDecodeLazyPixelRef();
+    return decoded;
+}
+
 } // namespace blink