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

src/effects/SkDisplacementMapEffect.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 "SkDisplacementMapEffect.h"
 
 #include "SkBitmap.h"
@@ skipping 325 matching lines @@
                                   SkIntToScalar(colorOffset.fY - displOffset.fY));
 
         paint.addColorFragmentProcessor(
             GrDisplacementMapEffect::Make(fXChannelSelector,
                                           fYChannelSelector,
                                           scale,
                                           displTexture.get(),
                                           offsetMatrix,
                                           colorTexture.get(),
                                           SkISize::Make(color->width(), color->height())));
-        paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
+        paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
         SkMatrix matrix;
         matrix.setTranslate(-SkIntToScalar(colorBounds.x()), -SkIntToScalar(colorBounds.y()));
 
         SkColorSpace* colorSpace = ctx.outputProperties().colorSpace();
         sk_sp<GrDrawContext> drawContext(
             context->makeDrawContext(SkBackingFit::kApprox, bounds.width(), bounds.height(),
                                      GrRenderableConfigForColorSpace(colorSpace),
                                      sk_ref_sp(colorSpace)));
         if (!drawContext) {
             return nullptr;
@@ skipping 275 matching lines @@
 void GrGLDisplacementMapEffect::GenKey(const GrProcessor& proc,
                                        const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif