Use a direct include of the message_loop header in chrome/test/, chrome/tools/, chrome/utility/.

chrome/test/chromedriver/net/net_util_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 <string>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "chrome/test/chromedriver/net/net_util.h"
 #include "chrome/test/chromedriver/net/url_request_context_getter.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/server/http_server.h"
@@ skipping 108 matching lines @@
   ASSERT_FALSE(FetchUrl(server_url_, context_getter_.get(), &response));
   ASSERT_STREQ("stuff", response.c_str());
 }
 
 TEST_F(FetchUrlTest, NoServer) {
   std::string response("stuff");
   ASSERT_FALSE(
       FetchUrl("http://localhost:33333", context_getter_.get(), &response));
   ASSERT_STREQ("stuff", response.c_str());
 }