Update SetPaintToLayer to accept LayerType

ui/app_list/views/app_list_folder_view.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/app_list/views/app_list_folder_view.h"
 
 #include <algorithm>
 
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 45 matching lines @@
 
   items_grid_view_ = new AppsGridView(app_list_main_view_);
   items_grid_view_->set_folder_delegate(this);
   items_grid_view_->SetLayout(
       container_view->apps_grid_view()->cols(),
       container_view->apps_grid_view()->rows_per_page());
   items_grid_view_->SetModel(model);
   AddChildView(items_grid_view_);
   view_model_->Add(items_grid_view_, kIndexChildItems);
 
-  SetPaintToLayer(true);
+  SetPaintToLayer();
   layer()->SetFillsBoundsOpaquely(false);
 
   model_->AddObserver(this);
 }
 
 AppListFolderView::~AppListFolderView() {
   model_->RemoveObserver(this);
 
   // This prevents the AppsGridView's destructor from calling the now-deleted
   // AppListFolderView's methods if a drag is in progress at the time.
@@ skipping 266 matching lines @@
 void AppListFolderView::GiveBackFocusToSearchBox() {
   app_list_main_view_->search_box_view()->search_box()->RequestFocus();
 }
 
 void AppListFolderView::SetItemName(AppListFolderItem* item,
                                     const std::string& name) {
   model_->SetItemName(item, name);
 }
 
 }  // namespace app_list