Extract l10n-related parts of NetworkScreenHandler to a helper file

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'variables': {
     'chrome_browser_ui_non_ios_sources': [
       'browser/ui/accelerator_utils.h',
       'browser/ui/android/android_about_app_info.cc',
       'browser/ui/android/android_about_app_info.h',
@@ skipping 948 matching lines @@
       'browser/ui/webui/chromeos/login/host_pairing_screen_handler.cc',
       'browser/ui/webui/chromeos/login/host_pairing_screen_handler.h',
       'browser/ui/webui/chromeos/login/inline_login_handler_chromeos.cc',
       'browser/ui/webui/chromeos/login/inline_login_handler_chromeos.h',
       'browser/ui/webui/chromeos/login/kiosk_app_menu_handler.cc',
       'browser/ui/webui/chromeos/login/kiosk_app_menu_handler.h',
       'browser/ui/webui/chromeos/login/kiosk_autolaunch_screen_handler.cc',
       'browser/ui/webui/chromeos/login/kiosk_autolaunch_screen_handler.h',
       'browser/ui/webui/chromeos/login/kiosk_enable_screen_handler.cc',
       'browser/ui/webui/chromeos/login/kiosk_enable_screen_handler.h',
+      'browser/ui/webui/chromeos/login/l10n_util.cc',
+      'browser/ui/webui/chromeos/login/l10n_util.h',
       'browser/ui/webui/chromeos/login/locally_managed_user_creation_screen_handler.cc',
       'browser/ui/webui/chromeos/login/locally_managed_user_creation_screen_handler.h',
       'browser/ui/webui/chromeos/login/network_dropdown.cc',
       'browser/ui/webui/chromeos/login/network_dropdown.h',
       'browser/ui/webui/chromeos/login/network_dropdown_handler.cc',
       'browser/ui/webui/chromeos/login/network_dropdown_handler.h',
       'browser/ui/webui/chromeos/login/network_screen_handler.cc',
       'browser/ui/webui/chromeos/login/network_screen_handler.h',
       'browser/ui/webui/chromeos/login/network_state_informer.cc',
       'browser/ui/webui/chromeos/login/network_state_informer.h',
@@ skipping 1964 matching lines @@
         }],
         ['enable_spellcheck==1', {
           'dependencies': [
             '../third_party/hunspell/hunspell.gyp:hunspell',
           ],
         }],
       ],
     },
   ],
 }