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

gm/imagefilterstransformed.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 "sk_tool_utils.h"
 #include "SkBlurImageFilter.h"
 #include "SkColor.h"
@@ skipping 109 matching lines @@
 #include "SkXfermodeImageFilter.h"
 
 DEF_SIMPLE_GM(rotate_imagefilter, canvas, 500, 500) {
     SkPaint paint;
 
     const SkRect r = SkRect::MakeXYWH(50, 50, 100, 100);
 
     sk_sp<SkImageFilter> filters[] = {
         nullptr,
         SkBlurImageFilter::Make(6, 0, nullptr),
-        SkXfermodeImageFilter::Make(SkXfermode::Make(SkXfermode::kSrcOver_Mode), nullptr),
+        SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver, nullptr),
     };
 
     for (auto& filter : filters) {
         paint.setAntiAlias(false);
         paint.setImageFilter(filter);
 
         canvas->save();
 
         canvas->drawRect(r, paint);
 
         canvas->translate(150, 0);
         canvas->save();
             canvas->rotate(30, 100, 100);
             canvas->drawRect(r, paint);
         canvas->restore();
 
         paint.setAntiAlias(true);
         canvas->translate(150, 0);
         canvas->save();
             canvas->rotate(30, 100, 100);
             canvas->drawRect(r, paint);
         canvas->restore();
 
         canvas->restore();
         canvas->translate(0, 150);
     }
 }