Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrConvolutionEffect.h

Index: src/gpu/effects/GrConvolutionEffect.h
diff --git a/src/gpu/effects/GrConvolutionEffect.h b/src/gpu/effects/GrConvolutionEffect.h
index f2a2d5a779d484a1e38a7448933c57d814f3d3d0..f61f378ec24e51f5889a2c7bd3fc195b5cc271f6 100644
--- a/src/gpu/effects/GrConvolutionEffect.h
+++ b/src/gpu/effects/GrConvolutionEffect.h
@@ -64,12 +64,6 @@ public:
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
 
-    virtual void getConstantColorComponents(GrColor*, uint32_t* validFlags) const {
-        // If the texture was opaque we could know that the output color if we knew the sum of the
-        // kernel values.
-        *validFlags = 0;
-    }
-
     enum {
         // This was decided based on the min allowed value for the max texture
         // samples per fragment program run in DX9SM2 (32). A sigma param of 4.0
@@ -103,6 +97,13 @@ private:
 
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onComputeInvariantOutput(InvariantOutput* inout) const {
+        // If the texture was opaque we could know that the output color if we knew the sum of the
+        // kernel values.
+        inout->fValidFlags = 0;
+        inout->fIsSingleComponent = false;
+    }
+
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef Gr1DKernelEffect INHERITED;