Remove wstring from l10n_util. Part 1....

chrome/browser/chromeos/login/keyboard_switch_menu.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_KEYBOARD_SWITCH_MENU_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_KEYBOARD_SWITCH_MENU_H_
 #pragma once
 
 #include <string>
 
@@ skipping 17 matching lines @@
                         const std::wstring& tooltip,
                         size_t num_active_input_methods);
   virtual bool ShouldSupportConfigUI() { return false; }
   virtual void OpenConfigUI() {}
 
   // views::ViewMenuDelegate implementation which overrides the implementation
   // in InputMethodMenu.
   virtual void RunMenu(views::View* source, const gfx::Point& pt);
 
   // Returns current keyboard name to be placed on the keyboard menu-button.
-  std::wstring GetCurrentKeyboardName() const;
+  string16 GetCurrentKeyboardName() const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(KeyboardSwitchMenu);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_KEYBOARD_SWITCH_MENU_H_