Revert of Add isSingleComponent bool to getConstantColorComponent

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index 251398ca5b64b2d1515c9129d929d43d2a135f5a..123b9d28e5cce98c688775626a38609bde1e617c 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -563,6 +563,8 @@
     typedef GrGLRectBlurEffect GLProcessor;
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
+    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
+
     /**
      * Create a simple filter effect with custom bicubic coefficients.
      */
@@ -591,8 +593,6 @@
 private:
     GrRectBlurEffect(const SkRect& rect, float sigma, GrTexture *blur_profile);
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
-
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
 
     static bool CreateBlurProfileTexture(GrContext *context, float sigma,
                                        GrTexture **blurProfileTexture);
@@ -765,9 +765,9 @@
     return this->getSigma() == s.getSigma() && this->getRect() == s.getRect();
 }
 
-void GrRectBlurEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
-    inout->fValidFlags = 0;
-    inout->fIsSingleComponent = false;
+void GrRectBlurEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
+    *validFlags = 0;
+    return;
 }
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRectBlurEffect);
@@ -837,14 +837,14 @@
 
     typedef GrGLRRectBlurEffect GLProcessor;
 
+    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
+
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
 
 private:
     GrRRectBlurEffect(float sigma, const SkRRect&, GrTexture* profileTexture);
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
-
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
 
     SkRRect             fRRect;
     float               fSigma;
@@ -929,9 +929,8 @@
     return SkNEW_ARGS(GrRRectBlurEffect, (sigma, rrect, blurNinePatchTexture));
 }
 
-void GrRRectBlurEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
-    inout->fValidFlags = 0;
-    inout->fIsSingleComponent = false;
+void GrRRectBlurEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
+    *validFlags = 0;
 }
 
 const GrBackendFragmentProcessorFactory& GrRRectBlurEffect::getFactory() const {