Adding blink side flag that allows disabling YUV decoding

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 4aa8a6dbffc57813ed87c567d7548c35d2586c47..05ef3ef9532a4c6ce06238135fdfe405bc9540ab 100644
--- a/Source/platform/graphics/DecodingImageGenerator.cpp
+++ b/Source/platform/graphics/DecodingImageGenerator.cpp
@@ -29,6 +29,7 @@
 #include "SkData.h"
 #include "SkImageInfo.h"
 #include "platform/PlatformInstrumentation.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/SharedBuffer.h"
 #include "platform/TraceEvent.h"
 #include "platform/graphics/ImageFrameGenerator.h"
@@ -85,9 +86,11 @@ bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels,
 
 bool DecodingImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3], SkYUVColorSpace* colorSpace)
 {
-    if (!planes || !planes[0]) {
+    if (!RuntimeEnabledFeatures::decodeToYUVEnabled())
+        return false;
+
+    if (!planes || !planes[0])
         return m_frameGenerator->getYUVComponentSizes(sizes);
-    }
 
     TRACE_EVENT0("blink", "DecodingImageGenerator::onGetYUV8Planes");
     PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId);