Extract l10n-related parts of NetworkScreenHandler to a helper file

chrome/chrome_tests_unit.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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1794 matching lines @@
         'browser/ui/views/tabs/fake_base_tab_strip_controller.h',
         'browser/ui/views/tabs/stacked_tab_strip_layout_unittest.cc',
         'browser/ui/views/tabs/tab_strip_unittest.cc',
         'browser/ui/views/tabs/tab_unittest.cc',
         'browser/ui/views/toolbar/reload_button_unittest.cc',
         'browser/ui/views/translate/translate_bubble_view_unittest.cc',
         'browser/ui/views/validation_message_bubble_delegate_unittest.cc',
         'browser/ui/website_settings/permission_bubble_manager_unittest.cc',
         'browser/ui/website_settings/permission_menu_model_unittest.cc',
         'browser/ui/website_settings/website_settings_unittest.cc',
+        'browser/ui/webui/chromeos/login/l10n_util_test_util.cc',
+        'browser/ui/webui/chromeos/login/l10n_util_test_util.h',
+        'browser/ui/webui/chromeos/login/l10n_util_unittest.cc',
         'browser/ui/webui/chromeos/login/signin_userlist_unittest.cc',
         'browser/ui/webui/fileicon_source_unittest.cc',
         'browser/ui/webui/history_ui_unittest.cc',
         'browser/ui/webui/ntp/ntp_user_data_logger_unittest.cc',
         'browser/ui/webui/ntp/suggestions_combiner_unittest.cc',
         'browser/ui/webui/options/chromeos/cros_language_options_handler_unittest.cc',
         'browser/ui/webui/options/language_options_handler_unittest.cc',
         'browser/ui/webui/options/pepper_flash_content_settings_utils_unittest.cc',
         'browser/ui/webui/performance_monitor/performance_monitor_ui_util_unittest.cc',
         'browser/ui/webui/print_preview/print_preview_ui_unittest.cc',
@@ skipping 1108 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }