ash: Do not use MessageLoopForUI when not needed.

ash/wm/toplevel_window_event_handler_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/wm/toplevel_window_event_handler.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/resize_shadow.h"
 #include "ash/wm/resize_shadow_controller.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace_controller.h"
 #include "base/compiler_specific.h"
-#include "base/message_loop/message_loop.h"
 #include "base/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/test/aura_test_base.h"
 #include "ui/aura/test/test_window_delegate.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/hit_test.h"
 #include "ui/events/event.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/gfx/screen.h"
@@ skipping 680 matching lines @@
 // immediately after the mouse release. views::Widget has this behavior.
 TEST_F(ToplevelWindowEventHandlerTest, CaptureLossAfterMouseRelease) {
   scoped_ptr<aura::Window> window(CreateWindow(HTNOWHERE));
   ui::test::EventGenerator generator(Shell::GetPrimaryRootWindow(),
                                      window.get());
   generator.PressLeftButton();
   window->SetCapture();
 
   aura::client::WindowMoveClient* move_client =
       aura::client::GetWindowMoveClient(window->GetRootWindow());
-  base::MessageLoopForUI::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&SendMouseReleaseAndReleaseCapture,
-                 base::Unretained(&generator),
-                 base::Unretained(window.get())));
+                 base::Unretained(&generator), base::Unretained(window.get())));
   EXPECT_EQ(aura::client::MOVE_SUCCESSFUL,
             move_client->RunMoveLoop(window.get(), gfx::Vector2d(),
                 aura::client::WINDOW_MOVE_SOURCE_MOUSE));
 }
 
 namespace {
 
 // Checks that |window| has capture and releases capture.
 void CheckHasCaptureAndReleaseCapture(aura::Window* window) {
   ASSERT_TRUE(window->HasCapture());
@@ skipping 16 matching lines @@
   EXPECT_EQ(aura::client::MOVE_SUCCESSFUL,
             move_client->RunMoveLoop(window.get(), gfx::Vector2d(),
                                      aura::client::WINDOW_MOVE_SOURCE_TOUCH));
 }
 
 // Showing the resize shadows when the mouse is over the window edges is tested
 // in resize_shadow_and_cursor_test.cc
 
 }  // namespace test
 }  // namespace ash