Revert of Add isSingleComponent bool to getConstantColorComponent

src/effects/SkMorphologyImageFilter.cpp

Index: src/effects/SkMorphologyImageFilter.cpp
diff --git a/src/effects/SkMorphologyImageFilter.cpp b/src/effects/SkMorphologyImageFilter.cpp
index 4c7f62482c64fd9c6330320a6cc82fa443dd4f3e..397e43193e087c232e5dc3c765665b0d3f6e3ca9 100644
--- a/src/effects/SkMorphologyImageFilter.cpp
+++ b/src/effects/SkMorphologyImageFilter.cpp
@@ -309,6 +309,7 @@
     typedef GrGLMorphologyEffect GLProcessor;
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
+    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
 
 protected:
 
@@ -316,8 +317,6 @@
 
 private:
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
-
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
 
     GrMorphologyEffect(GrTexture*, Direction, int radius, MorphologyType);
 
@@ -456,11 +455,10 @@
             this->type() == s.type());
 }
 
-void GrMorphologyEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
+void GrMorphologyEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
     // This is valid because the color components of the result of the kernel all come
     // exactly from existing values in the source texture.
-    this->updateInvariantOutputForModulation(inout);
-    inout->fIsSingleComponent = false;
+    this->updateConstantColorComponentsForModulation(color, validFlags);
 }
 
 ///////////////////////////////////////////////////////////////////////////////