Introduce GrColorSpaceXform, for gamut conversion on textures

src/image/SkImageShader.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkBitmapProvider.h"
 #include "SkImage_Base.h"
@@ skipping 104 matching lines @@
     GrTextureParams::FilterMode textureFilterMode =
     GrSkFilterQualityToGrFilterMode(filterQuality, viewM, this->getLocalMatrix(), &doBicubic);
     GrTextureParams params(tm, textureFilterMode);
     SkAutoTUnref<GrTexture> texture(as_IB(fImage)->asTextureRef(context, params, gammaTreatment));
     if (!texture) {
         return nullptr;
     }
 
     sk_sp<GrFragmentProcessor> inner;
     if (doBicubic) {
-        inner = GrBicubicEffect::Make(texture, matrix, tm);
+        inner = GrBicubicEffect::Make(texture, nullptr, matrix, tm);
     } else {
-        inner = GrSimpleTextureEffect::Make(texture, matrix, params);
+        inner = GrSimpleTextureEffect::Make(texture, nullptr, matrix, params);
     }
 
     if (GrPixelConfigIsAlphaOnly(texture->config())) {
         return inner;
     }
     return sk_sp<GrFragmentProcessor>(GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner)));
 }
 
 #endif