Use a direct include of the message_loop header in net/, part 2.

net/proxy/dhcp_proxy_script_fetcher_win_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 "net/proxy/dhcp_proxy_script_fetcher_win.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/perftimer.h"
 #include "base/rand_util.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
 #include "net/base/completion_callback.h"
 #include "net/proxy/dhcp_proxy_script_adapter_fetcher_win.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
@@ skipping 613 matching lines @@
   }
 
   // Re-do the first test to make sure the last test that was run did
   // not leave things in a bad state.
   (*test_functions.begin())(&client);
 }
 
 }  // namespace
 
 }  // namespace net