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

chromeos/dbus/mock_cryptohome_client.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/dbus/mock_cryptohome_client.h"
 
 #include "base/bind.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 
 using ::testing::Invoke;
 using ::testing::_;
 
 namespace chromeos {
 
 namespace {
 
 // Runs callback with true.
 void RunCallbackWithTrue(const BoolDBusMethodCallback& callback) {
   base::MessageLoop::current()->PostTask(
       FROM_HERE, base::Bind(callback, DBUS_METHOD_CALL_SUCCESS, true));
 }
 
 }  // namespace
 
 MockCryptohomeClient::MockCryptohomeClient() {
   ON_CALL(*this, IsMounted(_))
       .WillByDefault(Invoke(&RunCallbackWithTrue));
   ON_CALL(*this, InstallAttributesIsReady(_))
       .WillByDefault(Invoke(&RunCallbackWithTrue));
 }
 
 MockCryptohomeClient::~MockCryptohomeClient() {}
 
 }  // namespace chromeos