Move GrInvariantOutput out of GrProcessor and into its own class.

src/effects/SkLumaColorFilter.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLumaColorFilter.h"
 
 #include "SkColorPriv.h"
 #include "SkString.h"
 
 #if SK_SUPPORT_GPU
 #include "gl/GrGLProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrContext.h"
+#include "GrInvariantOutput.h"
 #include "GrTBackendProcessorFactory.h"
 #endif
 
 void SkLumaColorFilter::filterSpan(const SkPMColor src[], int count,
                                    SkPMColor dst[]) const {
     for (int i = 0; i < count; ++i) {
         SkPMColor c = src[i];
 
         /*
          * While LuminanceToAlpha is defined to operate on un-premultiplied
@@ skipping 77 matching lines @@
 
         }
 
     private:
         typedef GrGLFragmentProcessor INHERITED;
     };
 
 private:
     virtual bool onIsEqual(const GrFragmentProcessor&) const SK_OVERRIDE { return true; }
 
-    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
+    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE {
         // The output is always black. The alpha value for the color passed in is arbitrary.
         inout->setToOther(kRGB_GrColorComponentFlags, GrColorPackRGBA(0, 0, 0, 0),
-                          InvariantOutput::kWill_ReadInput);
+                          GrInvariantOutput::kWill_ReadInput);
     }
 };
 
 GrFragmentProcessor* SkLumaColorFilter::asFragmentProcessor(GrContext*) const {
     return LumaColorFilterEffect::Create();
 }
 #endif