stop using SkXfermode -- use SkBlendMode instead

ui/views/controls/scrollbar/overlay_scroll_bar.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 "ui/views/controls/scrollbar/overlay_scroll_bar.h"
 
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkColor.h"
-#include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 
 namespace views {
 namespace {
 
 // Total thickness of the thumb (matches visuals when hovered).
 const int kThumbThickness = 11;
@@ skipping 132 matching lines @@
     thumb_bounds.set_x(thumb->x());
     thumb_bounds.set_width(thumb->width());
   } else {
     thumb_bounds.set_y(thumb->y());
     thumb_bounds.set_height(thumb->height());
   }
   thumb->SetBoundsRect(thumb_bounds);
 }
 
 }  // namespace views