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

src/core/SkImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageFilter.h"
 
 #include "SkCanvas.h"
@@ skipping 263 matching lines @@
     return true;
 }
 
 #if SK_SUPPORT_GPU
 sk_sp<SkSpecialImage> SkImageFilter::DrawWithFP(GrContext* context,
                                                 sk_sp<GrFragmentProcessor> fp,
                                                 const SkIRect& bounds,
                                                 const OutputProperties& outputProperties) {
     GrPaint paint;
     paint.addColorFragmentProcessor(std::move(fp));
-    paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
+    paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
 
     sk_sp<SkColorSpace> colorSpace = sk_ref_sp(outputProperties.colorSpace());
     GrPixelConfig config = GrRenderableConfigForColorSpace(colorSpace.get());
     sk_sp<GrDrawContext> drawContext(context->makeDrawContext(SkBackingFit::kApprox,
                                                               bounds.width(), bounds.height(),
                                                               config,
                                                               std::move(colorSpace)));
     if (!drawContext) {
         return nullptr;
     }
@@ skipping 167 matching lines @@
     sk_sp<SkSpecialImage> result(input->filterImage(src, this->mapContext(ctx), offset));
 
     SkASSERT(!result || src->isTextureBacked() == result->isTextureBacked());
 
     return result;
 }
 
 void SkImageFilter::PurgeCache() {
     SkImageFilterCache::Get()->purge();
 }