stop using SkXfermode -- use SkBlendMode instead

cc/trees/layer_tree_host_pixeltest_masks.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include "build/build_config.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_image_layer.h"
 #include "cc/layers/picture_layer.h"
@@ skipping 294 matching lines @@
   picture_vertical->SetBounds(picture_bounds);
   picture_vertical->SetIsDrawable(true);
 
   CheckerContentLayerClient picture_client_horizontal(
       picture_bounds, SK_ColorMAGENTA, false);
   scoped_refptr<PictureLayer> picture_horizontal =
       PictureLayer::Create(&picture_client_horizontal);
   picture_horizontal->SetBounds(picture_bounds);
   picture_horizontal->SetIsDrawable(true);
   picture_horizontal->SetContentsOpaque(false);
-  picture_horizontal->SetBlendMode(SkXfermode::kMultiply_Mode);
+  picture_horizontal->SetBlendMode(SkBlendMode::kMultiply);
 
   background->AddChild(picture_vertical);
   background->AddChild(picture_horizontal);
 
   gfx::Size mask_bounds(128, 128);
   CircleContentLayerClient mask_client(mask_bounds);
   scoped_refptr<PictureLayer> mask = PictureLayer::Create(&mask_client);
   mask->SetBounds(mask_bounds);
   mask->SetIsDrawable(true);
   mask->SetIsMask(true);
@@ skipping 14 matching lines @@
 
   RunPixelResourceTest(background,
                        base::FilePath(
                            FILE_PATH_LITERAL("mask_of_layer_with_blend.png")));
 }
 
 }  // namespace
 }  // namespace cc
 
 #endif  // !defined(OS_ANDROID)