Revert[8] "replace SkXfermode obj with SkBlendMode enum in paints"

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 54 matching lines @@
         // better!
         SkASSERT(copyParams.fFilter != GrTextureParams::kMipMap_FilterMode);
         paint.addColorFragmentProcessor(
             GrTextureDomainEffect::Make(inputTexture, nullptr, SkMatrix::I(), domain,
                                         GrTextureDomain::kClamp_Mode,
                                         copyParams.fFilter));
     } else {
         GrTextureParams params(SkShader::kClamp_TileMode, copyParams.fFilter);
         paint.addColorTextureProcessor(inputTexture, nullptr, SkMatrix::I(), params);
     }
-    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
+    paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
 
     SkRect localRect;
     if (subset) {
         localRect = SkRect::Make(*subset);
         localRect.fLeft *= sx;
         localRect.fTop *= sy;
         localRect.fRight *= sx;
         localRect.fBottom *= sy;
     } else {
         localRect = SkRect::MakeWH(1.f, 1.f);
@@ skipping 427 matching lines @@
 }
 
 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);
 }