Revert of 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 ce787c6ab823da291e4df0caa83d3cd5be459805..f766562128cd6c1c65a700f6172b3fb19a1d5aac 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -350,14 +350,14 @@
     SkScalar surfaceScale() const { return fSurfaceScale; }
     const SkMatrix& filterMatrix() const { return fFilterMatrix; }
 
+    virtual void getConstantColorComponents(GrColor* color,
+                                            uint32_t* validFlags) const SK_OVERRIDE {
+        // lighting shaders are complicated. We just throw up our hands.
+        *validFlags = 0;
+    }
+
 protected:
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
-
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
-        // lighting shaders are complicated. We just throw up our hands.
-        inout->fValidFlags = 0;
-        inout->fIsSingleComponent = false;
-    }
 
 private:
     typedef GrSingleTextureEffect INHERITED;