The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6

commit a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6
Author: Tim Song <tengs@chromium.org>
Date: Wed Jul 19 04:56:50 2017

[EasyUnlock] Add pref for enabling EasyUnlock on the ChromeOS login screen.

BUG= 736094 

Change-Id: If5b7c7016daf0a0622ec5433d05b4fae6893475a
Reviewed-on: https://chromium-review.googlesource.com/567622
Commit-Queue: Tim Song <tengs@chromium.org>
Reviewed-by: Gustavo Sacomoto <sacomoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487755}
[modify] https://crrev.com/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6/chrome/browser/signin/easy_unlock_service_regular.cc
[modify] https://crrev.com/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6/components/proximity_auth/proximity_auth_pref_manager.cc
[modify] https://crrev.com/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6/components/proximity_auth/proximity_auth_pref_manager.h
[modify] https://crrev.com/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6/components/proximity_auth/proximity_auth_pref_manager_unittest.cc
[modify] https://crrev.com/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6/components/proximity_auth/proximity_auth_pref_names.cc
[modify] https://crrev.com/a3ba145eaa5dc1f7dd88a7fc015e124c6e6fa1f6/components/proximity_auth/proximity_auth_pref_names.h