The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69

commit 68a6654df5d8bdd23681d3e1acb7edeec3ae0b69
Author: Aga Wronska <agawronska@chromium.org>
Date: Fri Feb 02 19:11:59 2018

Make sure users list on login screen resizes properly after virtual keyboard is dismissed.

Add tests for layout of users list after rotation and after
virtual keyboard apperance changes.

Extract LoginKeyboardTestBase class as a base for tests that
need to manipulate virtual keyboard.

Bug:  807827 
Change-Id: I46a300ebbce8a59c9648573fede203ca0f21a292
Reviewed-on: https://chromium-review.googlesource.com/896966
Commit-Queue: Aga Wronska <agawronska@chromium.org>
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534115}
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/BUILD.gn
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/lock_contents_view_unittest.cc
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/lock_window_unittest.cc
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_auth_user_view_unittest.cc
[add] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_keyboard_test_base.cc
[add] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_keyboard_test_base.h
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_test_base.cc
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_test_base.h
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_test_utils.cc
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_test_utils.h
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/login_user_view_unittest.cc
[modify] https://crrev.com/68a6654df5d8bdd23681d3e1acb7edeec3ae0b69/ash/login/ui/scrollable_users_list_view.cc