Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrConfigConversionEffect.h

Index: src/gpu/effects/GrConfigConversionEffect.h
diff --git a/src/gpu/effects/GrConfigConversionEffect.h b/src/gpu/effects/GrConfigConversionEffect.h
index 765e49b45ba05995fb765133c8a571e280071eb3..e7d4cf4117b38280a4a24a128b0b5a9289306ea6 100644
--- a/src/gpu/effects/GrConfigConversionEffect.h
+++ b/src/gpu/effects/GrConfigConversionEffect.h
@@ -43,8 +43,6 @@ public:
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     bool swapsRedAndBlue() const { return fSwapRedAndBlue; }
     PMConversion  pmConversion() const { return fPMConversion; }
 
@@ -65,6 +63,9 @@ private:
 
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE;
+
     bool            fSwapRedAndBlue;
     PMConversion    fPMConversion;