Introduce GrColorSpaceXform, for gamut conversion on textures

tools/gpu/GrTest.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 "GrTest.h"
 
 #include "GrBatchAtlas.h"
@@ skipping 131 matching lines @@
                           this->surfaceProps().isGammaCorrect(), &grPaint)) {
         return;
     }
     SkMatrix textureMat;
     textureMat.reset();
     textureMat[SkMatrix::kMScaleX] = 1.0f/dst.width();
     textureMat[SkMatrix::kMScaleY] = 1.0f/dst.height();
     textureMat[SkMatrix::kMTransX] = -dst.fLeft/dst.width();
     textureMat[SkMatrix::kMTransY] = -dst.fTop/dst.height();
 
-    grPaint.addColorTextureProcessor(tex, textureMat);
+    grPaint.addColorTextureProcessor(tex, nullptr, textureMat);
 
     fDrawContext->drawRect(GrNoClip(), grPaint, mat, dst);
 }
 
 
 #if GR_GPU_STATS
 void GrGpu::Stats::dump(SkString* out) {
     out->appendf("Render Target Binds: %d\n", fRenderTargetBinds);
     out->appendf("Shader Compilations: %d\n", fShaderCompilations);
     out->appendf("Textures Created: %d\n", fTextureCreates);
@@ skipping 233 matching lines @@
     SkASSERT(nullptr == fGpu);
     fGpu = new MockGpu(this, options);
     SkASSERT(fGpu);
     this->initCommon(options);
 
     // We delete these because we want to test the cache starting with zero resources. Also, none of
     // these objects are required for any of tests that use this context. TODO: make stop allocating
     // resources in the buffer pools.
     fDrawingManager->abandon();
 }