Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrMatrixConvolutionEffect.h

Index: src/gpu/effects/GrMatrixConvolutionEffect.h
diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.h b/src/gpu/effects/GrMatrixConvolutionEffect.h
index 4cc4296eeeca2e007af008f322d5bcf7167adcbd..b11f60938599aed76bb1bcaa89fd896bce3622fd 100644
--- a/src/gpu/effects/GrMatrixConvolutionEffect.h
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.h
@@ -52,12 +52,6 @@ public:
 
     virtual ~GrMatrixConvolutionEffect();
 
-    virtual void getConstantColorComponents(GrColor* color,
-                                            uint32_t* validFlags) const SK_OVERRIDE {
-        // TODO: Try to do better?
-        *validFlags = 0;
-    }
-
     static const char* Name() { return "MatrixConvolution"; }
     const SkIRect& bounds() const { return fBounds; }
     const SkISize& kernelSize() const { return fKernelSize; }
@@ -85,6 +79,12 @@ private:
 
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE {
+        // TODO: Try to do better?
+        *validFlags = 0;
+    }
+
     SkIRect         fBounds;
     SkISize         fKernelSize;
     float           fKernel[MAX_KERNEL_SIZE];