Example of usage of new features of context and screen.

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.
 
 {
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2016 matching lines @@
         'browser/ui/webui/chromeos/keyboard_overlay_ui.h',
         'browser/ui/webui/chromeos/login/app_launch_splash_screen_handler.cc',
         'browser/ui/webui/chromeos/login/app_launch_splash_screen_handler.h',
         'browser/ui/webui/chromeos/login/authenticated_user_email_retriever.cc',
         'browser/ui/webui/chromeos/login/authenticated_user_email_retriever.h',
         'browser/ui/webui/chromeos/login/auto_enrollment_check_screen_handler.cc',
         'browser/ui/webui/chromeos/login/auto_enrollment_check_screen_handler.h',
         'browser/ui/webui/chromeos/login/base_screen_handler.cc',
         'browser/ui/webui/chromeos/login/base_screen_handler.h',
         'browser/ui/webui/chromeos/login/base_screen_handler_utils.h',
+        'browser/ui/webui/chromeos/login/controller_pairing_screen_handler.cc',
+        'browser/ui/webui/chromeos/login/controller_pairing_screen_handler.h',
         'browser/ui/webui/chromeos/login/core_oobe_handler.cc',
         'browser/ui/webui/chromeos/login/core_oobe_handler.h',
         'browser/ui/webui/chromeos/login/enrollment_screen_handler.cc',
         'browser/ui/webui/chromeos/login/enrollment_screen_handler.h',
         'browser/ui/webui/chromeos/login/error_screen_handler.cc',
         'browser/ui/webui/chromeos/login/error_screen_handler.h',
         'browser/ui/webui/chromeos/login/eula_screen_handler.cc',
         'browser/ui/webui/chromeos/login/eula_screen_handler.h',
         'browser/ui/webui/chromeos/login/gaia_screen_handler.cc',
         'browser/ui/webui/chromeos/login/gaia_screen_handler.h',
@@ skipping 1105 matching lines @@
           ],
           'sources!': [
             'browser/ui/views/session_crashed_bubble_view.cc',
             'browser/ui/views/session_crashed_bubble_view.h',
           ],
         }],
       ],
     },
   ],
 }