Add isSingleComponent bool to getConstantColorComponent

src/effects/SkColorFilters.cpp

Index: src/effects/SkColorFilters.cpp
diff --git a/src/effects/SkColorFilters.cpp b/src/effects/SkColorFilters.cpp
index bd0d2aa6c89cfe96e5306302ac8af3b8b09da265..b7fa8eb5701b7aa949a60f73048856132040ab1f 100644
--- a/src/effects/SkColorFilters.cpp
+++ b/src/effects/SkColorFilters.cpp
@@ -195,8 +195,6 @@ public:
         return SkNEW_ARGS(ModeColorFilterEffect, (c, mode));
     }
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     bool willUseFilterColor() const {
         SkXfermode::Coeff dstCoeff;
         SkXfermode::Coeff srcCoeff;
@@ -293,6 +291,9 @@ private:
         return fMode == s.fMode && fColor == s.fColor;
     }
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE;
+
     SkXfermode::Mode fMode;
     GrColor fColor;
 
@@ -382,7 +383,8 @@ private:
 
 }
 
-void ModeColorFilterEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
+void ModeColorFilterEffect::onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                                         bool* isSingleComponent) const {
     float inputColor[4];
     GrColorToRGBAFloat(*color, inputColor);
     float filterColor[4];