Use a direct include of the message_loop header in chromeos/.

chromeos/login/login_state_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 "chromeos/login/login_state.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
 
 class LoginStateTest : public testing::Test,
                        public LoginState::Observer {
  public:
   LoginStateTest()
@@ skipping 47 matching lines @@
   EXPECT_EQ(LoginState::LOGGED_IN_USER_REGULAR,
             LoginState::Get()->GetLoggedInUserType());
   EXPECT_TRUE(LoginState::Get()->IsUserLoggedIn());
   // Run the message loop, observer should update members.
   message_loop_.RunUntilIdle();
   EXPECT_EQ(LoginState::LOGGED_IN_ACTIVE, logged_in_state_);
   EXPECT_EQ(LoginState::LOGGED_IN_USER_REGULAR, logged_in_user_type_);
 }
 
 }  // namespace