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

remoting/protocol/buffered_socket_writer_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 "remoting/protocol/buffered_socket_writer.h"
 
 #include <stdlib.h>
 
 #include "base/bind.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "remoting/protocol/fake_session.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace remoting {
 namespace protocol {
 
 namespace {
@@ skipping 158 matching lines @@
   socket_->set_next_write_error(net::ERR_FAILED);
   message_loop_.RunUntilIdle();
   EXPECT_EQ(net::ERR_FAILED, write_error_);
   EXPECT_EQ(static_cast<size_t>(test_buffer_->size()),
             socket_->written_data().size());
 }
 
 }  // namespace protocol
 }  // namespace remoting