ash: Do not use MessageLoopForUI when not needed.

ash/shell_unittest.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 "ash/shell.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/drag_drop/drag_drop_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/shell_test_api.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "ash/wm/window_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/thread_task_runner_handle.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/events/test/events_test_utils.h"
 #include "ui/events/test/test_event_handler.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/views/controls/menu/menu_controller.h"
@@ skipping 318 matching lines @@
       new ui::SimpleMenuModel(&menu_delegate));
   menu_model->AddItem(0, base::ASCIIToUTF16("Menu item"));
   views::Widget* widget = ash::Shell::GetPrimaryRootWindowController()->
       wallpaper_controller()->widget();
   scoped_ptr<views::MenuRunner> menu_runner(
       new views::MenuRunner(menu_model.get(), views::MenuRunner::CONTEXT_MENU));
 
   // When MenuRunner runs a nested loop the LockScreenAndVerifyMenuClosed
   // command will fire, check the menu state and ensure the nested menu loop
   // is exited so that the test will terminate.
-  base::MessageLoopForUI::current()->PostTask(FROM_HERE,
-      base::Bind(&ShellTest::LockScreenAndVerifyMenuClosed,
-                 base::Unretained(this)));
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(&ShellTest::LockScreenAndVerifyMenuClosed,
+                            base::Unretained(this)));
 
   EXPECT_EQ(views::MenuRunner::NORMAL_EXIT,
             menu_runner->RunMenuAt(widget,
                                    NULL,
                                    gfx::Rect(),
                                    views::MENU_ANCHOR_TOPLEFT,
                                    ui::MENU_SOURCE_MOUSE));
 }
 
 TEST_F(ShellTest, ManagedWindowModeBasics) {
@@ skipping 145 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellTest2);
 };
 
 TEST_F(ShellTest2, DontCrashWhenWindowDeleted) {
   window_.reset(new aura::Window(NULL));
   window_->Init(ui::LAYER_NOT_DRAWN);
 }
 
 }  // namespace ash