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

remoting/protocol/authenticator_test_base.h

 // 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.
 
 #ifndef REMOTING_PROTOCOL_AUTHENTICATOR_TEST_BASE_H_
 #define REMOTING_PROTOCOL_AUTHENTICATOR_TEST_BASE_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "net/base/net_errors.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 class StreamSocket;
 }  // namespace net
 
 namespace remoting {
 
@@ skipping 46 matching lines @@
   scoped_ptr<net::StreamSocket> client_socket_;
   scoped_ptr<net::StreamSocket> host_socket_;
 
   DISALLOW_COPY_AND_ASSIGN(AuthenticatorTestBase);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_AUTHENTICATOR_TEST_BASE_H_