Add isSingleComponent bool to getConstantColorComponent

src/gpu/GrAAConvexPathRenderer.cpp

Index: src/gpu/GrAAConvexPathRenderer.cpp
diff --git a/src/gpu/GrAAConvexPathRenderer.cpp b/src/gpu/GrAAConvexPathRenderer.cpp
index dc74459e3e3c26393a42fcea2e17e849ae7bbc0d..4b3183dc5ad1ae153952017c44313d7e4950a9f7 100644
--- a/src/gpu/GrAAConvexPathRenderer.cpp
+++ b/src/gpu/GrAAConvexPathRenderer.cpp
@@ -517,11 +517,6 @@ public:
 
     static const char* Name() { return "QuadEdge"; }
 
-    virtual void getConstantColorComponents(GrColor* color,
-                                            uint32_t* validFlags) const SK_OVERRIDE {
-        *validFlags = 0;
-    }
-
     const GrShaderVar& inQuadEdge() const { return fInQuadEdge; }
 
     virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERRIDE {
@@ -593,6 +588,11 @@ private:
         return true;
     }
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE {
+        *validFlags = 0;
+    }
+
     const GrShaderVar& fInQuadEdge;
 
     GR_DECLARE_GEOMETRY_PROCESSOR_TEST;