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

chrome/browser/chromeos/settings/cros_settings_provider.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 "chrome/browser/chromeos/settings/cros_settings_provider.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/values.h"
 #include "chrome/common/chrome_switches.h"
 #include "chromeos/chromeos_switches.h"
 
 namespace chromeos {
 
 CrosSettingsProvider::CrosSettingsProvider(
     const NotifyObserversCallback& notify_cb)
   : notify_cb_(notify_cb) {
 }
@@ skipping 18 matching lines @@
   if (!notify_cb_.is_null())
     notify_cb_.Run(path);
 }
 
 void CrosSettingsProvider::SetNotifyObserversCallback(
     const NotifyObserversCallback& notify_cb) {
   notify_cb_ = notify_cb;
 }
 
 };  // namespace chromeos