Add support for the Rec601 YUV color space to GrYUVtoRGBEffect.

src/lazy/SkDiscardablePixelRef.h

Index: src/lazy/SkDiscardablePixelRef.h
diff --git a/src/lazy/SkDiscardablePixelRef.h b/src/lazy/SkDiscardablePixelRef.h
index d31a040164846d4af0780f0bac64b7c24c3326ca..142c8a45399b3f0f62bd497ea3d681a6d7b59e4d 100644
--- a/src/lazy/SkDiscardablePixelRef.h
+++ b/src/lazy/SkDiscardablePixelRef.h
@@ -50,8 +50,9 @@ private:
 
     virtual bool onGetYUV8Planes(SkISize sizes[3],
                                  void* planes[3],
-                                 size_t rowBytes[3]) SK_OVERRIDE {
-        return fGenerator->getYUV8Planes(sizes, planes, rowBytes);
+                                 size_t rowBytes[3],
+                                 SkYUVColorSpace* colorSpace) SK_OVERRIDE {
+        return fGenerator->getYUV8Planes(sizes, planes, rowBytes, colorSpace);
     }
 
     friend bool SkInstallDiscardablePixelRef(SkImageGenerator*, SkBitmap*,