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

chromeos/process_proxy/process_proxy_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 <gtest/gtest.h>
 
 #include <string>
 #include <sys/wait.h>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/process_util.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "chromeos/process_proxy/process_proxy_registry.h"
 
 namespace chromeos {
 
 namespace {
 
@@ skipping 225 matching lines @@
 }
 
 // Test verifies that \003 message send to process is processed as SigInt.
 // Timing out on the waterfall: http://crbug.com/115064
 TEST_F(ProcessProxyTest, DISABLED_SigInt) {
   test_runner_.reset(new SigIntTestRunner());
   RunTest();
 }
 
 }  // namespace chromeos