Create helper functions to use in computeInvariantOutput calls

src/effects/SkColorCubeFilter.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorCubeFilter.h"
 #include "SkColorPriv.h"
 #include "SkOnce.h"
@@ skipping 246 matching lines @@
 bool GrColorProfileEffect::onIsEqual(const GrProcessor& sBase) const {
     const GrColorProfileEffect& s = sBase.cast<GrColorProfileEffect>();
     return fColorCubeAccess.getTexture() == s.fColorCubeAccess.getTexture();
 }
 
 const GrBackendFragmentProcessorFactory& GrColorProfileEffect::getFactory() const {
     return GrTBackendFragmentProcessorFactory<GrColorProfileEffect>::getInstance();
 }
 
 void GrColorProfileEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
-    inout->fValidFlags = 0;
-    inout->fIsSingleComponent = false;
+    inout->setToUnknown();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrColorProfileEffect::GLProcessor::GLProcessor(const GrBackendProcessorFactory& factory,
                                                const GrProcessor&)
     : INHERITED(factory) {
 }
 
 GrColorProfileEffect::GLProcessor::~GLProcessor() {
@@ skipping 87 matching lines @@
         static_cast<GrTexture*>(context->findAndRefCachedResource(
             GrTexturePriv::ComputeKey(context->getGpu(), NULL, desc, cacheID))));
 
     if (!textureCube) {
         textureCube.reset(context->createTexture(NULL, desc, cacheID, fCubeData->data(), 0));
     }
 
     return textureCube ? GrColorProfileEffect::Create(textureCube) : NULL;
 }
 #endif