Use a direct include of strings headers in chrome/browser/chromeos/.

chrome/browser/chromeos/login/chrome_restart_request.cc

 // Copyright 2013 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 "chrome/browser/chromeos/login/chrome_restart_request.h"
 
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/prefs/json_pref_store.h"
 #include "base/prefs/pref_service.h"
 #include "base/process_util.h"
-#include "base/stringprintf.h"
 #include "base/strings/string_split.h"
+#include "base/strings/stringprintf.h"
 #include "base/timer.h"
 #include "base/values.h"
 #include "cc/base/switches.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
@@ skipping 312 matching lines @@
     // Relaunch chrome without session manager on dev box.
     ReLaunch(command_line);
     return;
   }
 
   // ChromeRestartRequest deletes itself after request sent to session manager.
   (new ChromeRestartRequest(command_line))->Start();
 }
 
 }  // namespace chromeos