Add isSingleComponent bool to getConstantColorComponent

src/effects/SkLightingImageFilter.cpp

Index: src/effects/SkLightingImageFilter.cpp
diff --git a/src/effects/SkLightingImageFilter.cpp b/src/effects/SkLightingImageFilter.cpp
index f766562128cd6c1c65a700f6172b3fb19a1d5aac..47e1ae650b4d404f45eaa77d1f78111284ee20cf 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -350,15 +350,15 @@ public:
     SkScalar surfaceScale() const { return fSurfaceScale; }
     const SkMatrix& filterMatrix() const { return fFilterMatrix; }
 
-    virtual void getConstantColorComponents(GrColor* color,
-                                            uint32_t* validFlags) const SK_OVERRIDE {
+protected:
+    virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
+
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE {
         // lighting shaders are complicated. We just throw up our hands.
         *validFlags = 0;
     }
 
-protected:
-    virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
-
 private:
     typedef GrSingleTextureEffect INHERITED;
     const SkLight* fLight;