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

chromeos/dbus/ibus/ibus_input_context_client_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 "chromeos/dbus/ibus/ibus_input_context_client.h"
 
 #include <map>
 #include <string>
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "chromeos/dbus/ibus/ibus_constants.h"
 #include "chromeos/dbus/ibus/ibus_text.h"
 #include "dbus/message.h"
 #include "dbus/mock_bus.h"
 #include "dbus/mock_object_proxy.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Invoke;
 using ::testing::Return;
@@ skipping 615 matching lines @@
   // Create response.
   scoped_ptr<dbus::Response> response(dbus::Response::CreateEmpty());
   response_ = response.get();
 
   // Call SetCursorLocation.
   client_->PropertyActivate(kPropertyKey, kPropertyState);
   // Run the message loop.
   message_loop_.RunUntilIdle();
 }
 }  // namespace chromeos