Create a dialog that warns about possible UI-oddities of the multi-profiles window teleport

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 312 matching lines @@
         'browser/ui/ash/launcher/shell_window_launcher_item_controller.h',
         'browser/ui/ash/launcher/shell_window_launcher_controller.cc',
         'browser/ui/ash/launcher/shell_window_launcher_controller.h',
         'browser/ui/ash/multi_user/multi_user_context_menu.cc',
         'browser/ui/ash/multi_user/multi_user_context_menu.h',
         'browser/ui/ash/multi_user/multi_user_context_menu_chromeos.cc',
         'browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos.cc',
         'browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos.h',
         'browser/ui/ash/multi_user/multi_user_util.cc',
         'browser/ui/ash/multi_user/multi_user_util.h',
+        'browser/ui/ash/multi_user/multi_user_warning_dialog.cc',
+        'browser/ui/ash/multi_user/multi_user_warning_dialog.h',
         'browser/ui/ash/multi_user/multi_user_window_manager.cc',
         'browser/ui/ash/multi_user/multi_user_window_manager.h',
         'browser/ui/ash/multi_user/multi_user_window_manager_chromeos.cc',
         'browser/ui/ash/multi_user/multi_user_window_manager_chromeos.h',
         'browser/ui/ash/multi_user/multi_user_window_manager_stub.cc',
         'browser/ui/ash/multi_user/multi_user_window_manager_stub.h',
         'browser/ui/ash/screenshot_taker.cc',
         'browser/ui/ash/screenshot_taker.h',
         'browser/ui/ash/session_state_delegate_chromeos.cc',
         'browser/ui/ash/session_state_delegate_chromeos.h',
@@ skipping 3045 matching lines @@
             'browser/ui/webui/local_discovery/local_discovery_ui.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui.h',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.h',
           ],
         }],
       ],
     },
   ],
 }