Revert of Change SkShader;asFragmentProcessor signature to no longer take skpaint\grcolor*

include/gpu/effects/GrConstColorProcessor.h

Index: include/gpu/effects/GrConstColorProcessor.h
diff --git a/include/gpu/effects/GrConstColorProcessor.h b/include/gpu/effects/GrConstColorProcessor.h
index f5fdb7e35cfbc8dc3a292736a00ba032e9c9d2b7..ccd28684a5675c5d33e7bb5ef087f968d86807fe 100644
--- a/include/gpu/effects/GrConstColorProcessor.h
+++ b/include/gpu/effects/GrConstColorProcessor.h
@@ -9,6 +9,8 @@
 #define GrColorProcessor_DEFINED
 
 #include "GrFragmentProcessor.h"
+
+class GrInvariantOutput;
 
 /**
  * This is a simple GrFragmentProcessor that outputs a constant color. It may do one of the
@@ -29,6 +31,8 @@
     static GrFragmentProcessor* Create(GrColor color, InputMode mode) {
         return new GrConstColorProcessor(color, mode);
     }
+
+    ~GrConstColorProcessor() override {}
 
     const char* name() const override { return "Color"; }