Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrYUVtoRGBEffect.cpp

Index: src/gpu/effects/GrYUVtoRGBEffect.cpp
diff --git a/src/gpu/effects/GrYUVtoRGBEffect.cpp b/src/gpu/effects/GrYUVtoRGBEffect.cpp
index 436106c991e388731391885ca98ef68fb1925e54..cdbe654edec2e9e2bb3f76f4d383592cb7180d57 100644
--- a/src/gpu/effects/GrYUVtoRGBEffect.cpp
+++ b/src/gpu/effects/GrYUVtoRGBEffect.cpp
@@ -28,13 +28,6 @@ public:
         return GrTBackendFragmentProcessorFactory<YUVtoRGBEffect>::getInstance();
     }
 
-    virtual void getConstantColorComponents(GrColor* color,
-                                            uint32_t* validFlags) const SK_OVERRIDE {
-        // YUV is opaque
-        *color = 0xFF;
-        *validFlags = kA_GrColorComponentFlag;
-    }
-
     SkYUVColorSpace getColorSpace() const {
         return fColorSpace;
     }
@@ -117,6 +110,13 @@ private:
                fColorSpace == s.getColorSpace();
     }
 
+    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
+        // YUV is opaque
+        inout->fColor = 0xFF;
+        inout->fValidFlags = kA_GrColorComponentFlag;
+        inout->fIsSingleComponent = false;
+    }
+
     GrCoordTransform fCoordTransform;
     GrTextureAccess fYAccess;
     GrTextureAccess fUAccess;