Turn AppList context menus Async

ui/app_list/views/app_list_menu_views.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_menu_views.h"
 
 #include "ui/app_list/app_list_view_delegate.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/menu/menu_config.h"
 #include "ui/views/controls/menu/menu_item_view.h"
 #include "ui/views/controls/menu/submenu_view.h"
 #include "ui/views/layout/grid_layout.h"
 
 using views::MenuItemView;
 
 namespace app_list {
 
 AppListMenuViews::AppListMenuViews(AppListViewDelegate* delegate)
     : AppListMenu(delegate) {
   menu_delegate_.reset(new views::MenuModelAdapter(menu_model()));
   menu_ = new MenuItemView(menu_delegate_.get());
-  menu_runner_.reset(new views::MenuRunner(menu_, 0));
+  menu_runner_.reset(new views::MenuRunner(menu_, views::MenuRunner::ASYNC));
   menu_delegate_->BuildMenu(menu_);
 }
 
 AppListMenuViews::~AppListMenuViews() {}
 
 void AppListMenuViews::RunMenuAt(views::MenuButton* button,
                                  const gfx::Point& point) {
   ignore_result(menu_runner_->RunMenuAt(button->GetWidget(),
                                         button,
                                         gfx::Rect(point, gfx::Size()),
                                         views::MENU_ANCHOR_TOPRIGHT,
                                         ui::MENU_SOURCE_NONE));
 }
 
 void AppListMenuViews::Cancel() {
   menu_runner_->Cancel();
 }
 
 }  // namespace app_list