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

chrome/browser/chromeos/power/peripheral_battery_observer.cc

 // Copyright (c) 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/power/peripheral_battery_observer.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "base/bind.h"
-#include "base/string16.h"
-#include "base/stringprintf.h"
+#include "base/strings/string16.h"
 #include "base/strings/string_split.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "grit/ash_strings.h"
@@ skipping 206 matching lines @@
                             ProfileManager::GetDefaultProfileOrOffTheRecord());
 
   return true;
 }
 
 void PeripheralBatteryObserver::CancelNotification(const std::string& address) {
   g_browser_process->notification_ui_manager()->CancelById(address);
 }
 
 }  // namespace chromeos