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

chromeos/dbus/fake_cros_disks_client.cc

 // Copyright (c) 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 "chromeos/dbus/fake_cros_disks_client.h"
 
 #include "base/bind.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 
 namespace chromeos {
 
 FakeCrosDisksClient::FakeCrosDisksClient()
   : unmount_call_count_(0),
     unmount_success_(true),
     format_device_call_count_(0),
     format_device_success_(true) {
 }
 
@@ skipping 71 matching lines @@
     const std::string& source_path,
     MountType mount_type,
     const std::string& mount_path) {
   if (mount_completed_handler_.is_null())
     return false;
   mount_completed_handler_.Run(error_code, source_path, mount_type, mount_path);
   return true;
 }
 
 }  // namespace chromeos