Use a direct include of strings headers in chrome/test/.

chrome/test/reliability/page_load_test.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.
 //
 // This file provides reliablity test which runs under UI test framework. The
 // test is intended to run within QEMU environment.
 //
 // Usage 1: reliability_test
 // Upon invocation, it visits a hard coded list of sample URLs. This is mainly
 // used by buildbot, to verify reliability_test itself runs ok.
@@ skipping 31 matching lines @@
 #include "base/file_util.h"
 #include "base/file_version_info.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/i18n/time_formatting.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/prefs/json_pref_store.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
-#include "base/string_util.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
 #include "base/test/test_file_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/time.h"
 #include "chrome/browser/net/url_fixer_upper.h"
 #include "chrome/browser/prefs/pref_service_mock_builder.h"
 #include "chrome/common/automation_messages.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
@@ skipping 747 matching lines @@
   if (!g_end_url.empty()) {
     NavigateToURLLogResult(
         g_end_url, log_file, NULL, g_continuous_load, false);
   }
 
   log_file.close();
 }
 
 }  // namespace