Cleanup GPU gamut transformation code

src/gpu/GrTextureParamsAdjuster.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 "GrTextureParamsAdjuster.h"
 
 #include "GrCaps.h"
@@ skipping 406 matching lines @@
         domainMode =
             determine_domain_mode(*constraintRect, filterConstraint, coordsLimitedToConstraintRect,
                                   texture->width(), texture->height(),
                                   contentArea, &kBilerp, &domain);
         SkASSERT(kTightCopy_DomainMode != domainMode);
     }
     SkASSERT(kNoDomain_DomainMode == domainMode ||
              (domain.fLeft <= domain.fRight && domain.fTop <= domain.fBottom));
     textureMatrix.postIDiv(texture->width(), texture->height());
     sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(this->getColorSpace(),
-                                                                       dstColorSpace,
-                                                                       this->alphaType());
+                                                                       dstColorSpace);
     return create_fp_for_domain_and_filter(texture, std::move(colorSpaceXform), textureMatrix,
                                            domainMode, domain, filterOrNullForBicubic);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GrTexture* GrTextureMaker::refTextureForParams(const GrTextureParams& params,
                                                SkSourceGammaTreatment gammaTreatment) {
     CopyParams copyParams;
     bool willBeMipped = params.filterMode() == GrTextureParams::kMipMap_FilterMode;
@@ skipping 61 matching lines @@
     }
     SkRect domain;
     DomainMode domainMode =
         determine_domain_mode(constraintRect, filterConstraint, coordsLimitedToConstraintRect,
                               texture->width(), texture->height(), nullptr, fmForDetermineDomain,
                               &domain);
     SkASSERT(kTightCopy_DomainMode != domainMode);
     SkMatrix normalizedTextureMatrix = textureMatrix;
     normalizedTextureMatrix.postIDiv(texture->width(), texture->height());
     sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(this->getColorSpace(),
-                                                                       dstColorSpace,
-                                                                       this->alphaType());
+                                                                       dstColorSpace);
     return create_fp_for_domain_and_filter(texture, std::move(colorSpaceXform),
                                            normalizedTextureMatrix, domainMode, domain,
                                            filterOrNullForBicubic);
 }
 
 GrTexture* GrTextureMaker::generateTextureForParams(const CopyParams& copyParams, bool willBeMipped,
                                                     SkSourceGammaTreatment gammaTreatment) {
     SkAutoTUnref<GrTexture> original(this->refOriginalTexture(willBeMipped, gammaTreatment));
     if (!original) {
         return nullptr;
     }
     return copy_on_gpu(original, nullptr, copyParams);
 }