Implement a policy to autologin a public account.

chrome/chrome_tests.gypi

 # Copyright 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1062 matching lines @@
         'browser/chromeos/extensions/info_private_apitest.cc',
         'browser/chromeos/extensions/input_method_apitest_chromeos.cc',
         'browser/chromeos/extensions/networking_private_apitest.cc',
         'browser/chromeos/extensions/power/power_api_browsertest.cc',
         'browser/chromeos/extensions/wallpaper_private_apitest.cc',
         'browser/chromeos/kiosk_mode/mock_kiosk_mode_settings.cc',
         'browser/chromeos/kiosk_mode/mock_kiosk_mode_settings.h',
         'browser/chromeos/login/enrollment/enterprise_enrollment_screen_browsertest.cc',
         'browser/chromeos/login/enrollment/mock_enterprise_enrollment_screen.cc',
         'browser/chromeos/login/enrollment/mock_enterprise_enrollment_screen.h',
+        'browser/chromeos/login/existing_user_controller_auto_login_unittest.cc',
         'browser/chromeos/login/existing_user_controller_browsertest.cc',
         'browser/chromeos/login/login_utils_browsertest.cc',
         'browser/chromeos/login/mock_authenticator.cc',
         'browser/chromeos/login/mock_authenticator.h',
         'browser/chromeos/login/mock_eula_screen.cc',
         'browser/chromeos/login/mock_eula_screen.h',
+        'browser/chromeos/login/mock_login_display.cc',
+        'browser/chromeos/login/mock_login_display.h',
+        'browser/chromeos/login/mock_login_display_host.cc',
+        'browser/chromeos/login/mock_login_display_host.h',
         'browser/chromeos/login/mock_network_screen.cc',
         'browser/chromeos/login/mock_network_screen.h',
         'browser/chromeos/login/mock_screen_observer.cc',
         'browser/chromeos/login/mock_screen_observer.h',
         'browser/chromeos/login/mock_update_screen.cc',
         'browser/chromeos/login/mock_update_screen.h',
         'browser/chromeos/login/network_screen_browsertest.cc',
         'browser/chromeos/login/screen_locker_tester.cc',
         'browser/chromeos/login/screen_locker_tester.h',
         'browser/chromeos/login/test_login_utils.cc',
@@ skipping 199 matching lines @@
         'browser/net/proxy_browsertest.cc',
         'browser/net/websocket_browsertest.cc',
         'browser/notifications/message_center_notifications_browsertest.cc',
         'browser/page_cycler/page_cycler_browsertest.cc',
         'browser/performance_monitor/performance_monitor_browsertest.cc',
         'browser/policy/cloud_policy_browsertest.cc',
         'browser/policy/cloud_policy_manager_browsertest.cc',
         'browser/policy/device_local_account_browsertest.cc',
         'browser/policy/device_management_service_browsertest.cc',
         'browser/policy/device_status_collector_browsertest.cc',
+        'browser/policy/mock_cloud_policy_store.cc',
+        'browser/policy/mock_cloud_policy_store.h',
         'browser/policy/policy_browsertest.cc',
         'browser/policy/policy_prefs_browsertest.cc',
         'browser/policy/power_policy_browsertest.cc',
         'browser/policy/test_request_interceptor.cc',
         'browser/policy/test_request_interceptor.h',
         'browser/policy/test_utils.cc',
         'browser/policy/test_utils.h',
         'browser/popup_blocker_browsertest.cc',
         'browser/prefs/pref_service_browsertest.cc',
         'browser/prerender/prefetch_browsertest.cc',
@@ skipping 1858 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/browser_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }