Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrCustomCoordsTextureEffect.h

Index: src/gpu/effects/GrCustomCoordsTextureEffect.h
diff --git a/src/gpu/effects/GrCustomCoordsTextureEffect.h b/src/gpu/effects/GrCustomCoordsTextureEffect.h
index f48a144c5654545eb8676233cdd307b5bb5cb840..5c2b929c429649811ba2902026746fa061e847e3 100644
--- a/src/gpu/effects/GrCustomCoordsTextureEffect.h
+++ b/src/gpu/effects/GrCustomCoordsTextureEffect.h
@@ -28,8 +28,6 @@ public:
 
     static const char* Name() { return "Texture"; }
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     const GrShaderVar& inTextureCoords() const { return fInTextureCoords; }
 
     typedef GrGLCustomCoordsTextureEffect GLProcessor;
@@ -41,6 +39,9 @@ private:
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE;
+
     GrTextureAccess    fTextureAccess;
     const GrShaderVar& fInTextureCoords;