Update SetPaintToLayer to accept LayerType

ui/views/controls/combobox/combobox.cc

 // Copyright (c) 2012 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/combobox/combobox.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/base/default_style.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/models/combobox_model.h"
 #include "ui/base/models/combobox_model_observer.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/compositor/layer_type.h"
 #include "ui/events/event.h"
 #include "ui/gfx/animation/throb_animation.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/scoped_canvas.h"
 #include "ui/gfx/text_utils.h"
 #include "ui/native_theme/common_theme.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/native_theme/native_theme_aura.h"
 #include "ui/resources/grit/ui_resources.h"
@@ skipping 404 matching lines @@
   }
 
   text_button_->SetVisible(true);
   arrow_button_->SetVisible(true);
   AddChildView(text_button_);
   AddChildView(arrow_button_);
 
   // A layer is applied to make sure that canvas bounds are snapped to pixel
   // boundaries (for the sake of drawing the arrow).
   if (UseMd()) {
-    SetPaintToLayer(true);
+    SetPaintToLayer(ui::LAYER_TEXTURED);
     layer()->SetFillsBoundsOpaquely(false);
   } else {
     arrow_image_ = PlatformStyle::CreateComboboxArrow(enabled(), style);
   }
 }
 
 Combobox::~Combobox() {
   if (GetInputMethod() && selector_.get()) {
     // Combobox should have been blurred before destroy.
     DCHECK(selector_.get() != GetInputMethod()->GetTextInputClient());
@@ skipping 553 matching lines @@
   const int kMdPaddingWidth = 8;
   int arrow_pad = UseMd() ? kMdPaddingWidth
                           : PlatformStyle::kComboboxNormalArrowPadding;
   int padding = style_ == STYLE_NORMAL
                     ? arrow_pad * 2
                     : kActionLeftPadding + kActionRightPadding;
   return ArrowSize().width() + padding;
 }
 
 }  // namespace views