The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/40623d5565c804b39b42adc871594fbb4566575a

commit 40623d5565c804b39b42adc871594fbb4566575a
Author: Jacob Dufault <jdufault@google.com>
Date: Fri Sep 15 17:22:53 2017

cros: Load users via LockScreenController::LoadUsers.

This unifies the code path with the WebUI implementation and gives
access to additional information.

Bug:  731191 ,  719015 
Change-Id: I69a47c30e528b489682aebd5ce4d4b17517bcd88
Reviewed-on: https://chromium-review.googlesource.com/668068
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Jacob Dufault <jdufault@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502293}
[modify] https://crrev.com/40623d5565c804b39b42adc871594fbb4566575a/ash/login/lock_screen_controller.cc
[modify] https://crrev.com/40623d5565c804b39b42adc871594fbb4566575a/ash/login/lock_screen_controller.h
[modify] https://crrev.com/40623d5565c804b39b42adc871594fbb4566575a/ash/login/ui/lock_contents_view.cc
[modify] https://crrev.com/40623d5565c804b39b42adc871594fbb4566575a/ash/login/ui/lock_contents_view.h
[modify] https://crrev.com/40623d5565c804b39b42adc871594fbb4566575a/ash/login/ui/lock_screen.cc
[modify] https://crrev.com/40623d5565c804b39b42adc871594fbb4566575a/ash/login/ui/lock_screen.h