Push usage of GrColor4f into OverrideInput

include/gpu/GrFragmentProcessor.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrFragmentProcessor_DEFINED
 #define GrFragmentProcessor_DEFINED
 
@@ skipping 27 matching lines @@
      *  rgb and then multiplies all the components by the input alpha. This effectively modulates
      *  the child processor's premul color by a unpremul'ed input and produces a premul output
      */
     static sk_sp<GrFragmentProcessor> MulOutputByInputUnpremulColor(sk_sp<GrFragmentProcessor>);
 
     /**
      *  Returns a parent fragment processor that adopts the passed fragment processor as a child.
      *  The parent will ignore its input color and instead feed the passed in color as input to the
      *  child.
      */
-    static sk_sp<GrFragmentProcessor> OverrideInput(sk_sp<GrFragmentProcessor>, GrColor);
+    static sk_sp<GrFragmentProcessor> OverrideInput(sk_sp<GrFragmentProcessor>, GrColor4f);
 
     /**
      *  Returns a fragment processor that premuls the input before calling the passed in fragment
      *  processor.
      */
     static sk_sp<GrFragmentProcessor> PremulInput(sk_sp<GrFragmentProcessor>);
 
     /**
      * Returns a fragment processor that runs the passed in array of fragment processors in a
      * series. The original input is passed to the first, the first's output is passed to the
@@ skipping 178 matching lines @@
     /**
      * This is not SkSTArray<1, sk_sp<GrFragmentProcessor>> because this class holds strong
      * references until notifyRefCntIsZero and then it holds pending executions.
      */
     SkSTArray<1, GrFragmentProcessor*, true>    fChildProcessors;
 
     typedef GrProcessor INHERITED;
 };
 
 #endif