Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrConvexPolyEffect.h

Index: src/gpu/effects/GrConvexPolyEffect.h
diff --git a/src/gpu/effects/GrConvexPolyEffect.h b/src/gpu/effects/GrConvexPolyEffect.h
index e4749390a4a3e222c198fb956ab38ea66b4b73b4..265d45a4ad48c8cb14b1cca093de43fedec632ca 100644
--- a/src/gpu/effects/GrConvexPolyEffect.h
+++ b/src/gpu/effects/GrConvexPolyEffect.h
@@ -70,8 +70,6 @@ public:
 
     typedef GrGLConvexPolyEffect GLProcessor;
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
 
 private:
@@ -79,6 +77,9 @@ private:
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE;
+
     GrPrimitiveEdgeType    fEdgeType;
     int                    fEdgeCount;
     SkScalar               fEdges[3 * kMaxEdges];