Revert of Multiprofile security: Show a warning messagebox when desktop casting/sharing is turned on upon user

ash/ash.gyp

 # Copyright (c) 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': {
     'chromium_code': 1,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     # These files lists are shared with the GN build.
     'ash_sources': [
@@ skipping 273 matching lines @@
       'system/chromeos/brightness/brightness_controller_chromeos.h',
       'system/chromeos/brightness/tray_brightness.cc',
       'system/chromeos/brightness/tray_brightness.h',
       'system/chromeos/enterprise/enterprise_domain_observer.h',
       'system/chromeos/enterprise/tray_enterprise.cc',
       'system/chromeos/enterprise/tray_enterprise.h',
       'system/chromeos/keyboard_brightness_controller.cc',
       'system/chromeos/keyboard_brightness_controller.h',
       'system/chromeos/label_tray_view.cc',
       'system/chromeos/label_tray_view.h',
-      'system/chromeos/multi_user/user_switch_util.cc',
-      'system/chromeos/multi_user/user_switch_util.h',
       'system/chromeos/network/network_connect.cc',
       'system/chromeos/network/network_connect.h',
       'system/chromeos/network/network_detailed_view.h',
       'system/chromeos/network/network_observer.h',
       'system/chromeos/network/network_portal_detector_observer.h',
       'system/chromeos/network/network_state_list_detailed_view.cc',
       'system/chromeos/network/network_state_list_detailed_view.h',
       'system/chromeos/network/network_state_notifier.cc',
       'system/chromeos/network/network_state_notifier.h',
       'system/chromeos/network/tray_network.cc',
@@ skipping 500 matching lines @@
       'shell_unittest.cc',
       'sticky_keys/sticky_keys_overlay_unittest.cc',
       'sticky_keys/sticky_keys_unittest.cc',
       'system/chromeos/brightness/tray_brightness_unittest.cc',
       'system/chromeos/network/network_state_notifier_unittest.cc',
       'system/chromeos/power/power_event_observer_unittest.cc',
       'system/chromeos/power/power_status_unittest.cc',
       'system/chromeos/power/power_status_view_unittest.cc',
       'system/chromeos/power/tray_power_unittest.cc',
       'system/chromeos/rotation/tray_rotation_lock_unittest.cc',
-      'system/chromeos/multi_user/user_switch_util_unittest.cc',
       'system/chromeos/screen_security/screen_tray_item_unittest.cc',
       'system/chromeos/session/logout_confirmation_controller_unittest.cc',
       'system/chromeos/session/tray_session_length_limit_unittest.cc',
       'system/chromeos/supervised/tray_supervised_user_unittest.cc',
       'system/chromeos/tray_display_unittest.cc',
       'system/date/date_view_unittest.cc',
       'system/overview/overview_button_tray_unittest.cc',
       'system/tray/media_security/multi_profile_media_tray_item_unittest.cc',
       'system/tray/system_tray_unittest.cc',
       'system/tray/tray_details_view_unittest.cc',
@@ skipping 427 matching lines @@
       'conditions': [
         ['chromeos==1', {
           'dependencies': [
             '../ui/display/display.gyp:display',
           ],
         }],
       ],
     },
   ],
 }