Add support for the Rec601 YUV color space to GrYUVtoRGBEffect.

src/gpu/effects/GrYUVtoRGBEffect.h

Index: src/gpu/effects/GrYUVtoRGBEffect.h
diff --git a/src/gpu/effects/GrYUVtoRGBEffect.h b/src/gpu/effects/GrYUVtoRGBEffect.h
index 150acd5a9027a553fac11d5a3a5813208a9333fa..016ea54f9f4ce6761dee3f8d4aeaabd09e78911b 100644
--- a/src/gpu/effects/GrYUVtoRGBEffect.h
+++ b/src/gpu/effects/GrYUVtoRGBEffect.h
@@ -8,6 +8,8 @@
 #ifndef GrYUVtoRGBEffect_DEFINED
 #define GrYUVtoRGBEffect_DEFINED
 
+#include "SkPixelRef.h"
+
 class GrEffect;
 class GrTexture;
 
@@ -15,7 +17,8 @@ namespace GrYUVtoRGBEffect {
     /**
      * Creates an effect that performs color conversion from YUV to RGB
      */
-    GrEffect* Create(GrTexture* yTexture, GrTexture* uTexture, GrTexture* vTexture);
+    GrEffect* Create(GrTexture* yTexture, GrTexture* uTexture, GrTexture* vTexture,
+                     SkPixelRef::YUVColorSpace type);
 };
 
 #endif