GitLab

It is possible to drop using wallpaper test client for the set of unit
tests where wallpaper test client is used to prevent crash from the
fake user manager.

Test: git cl try
Bug: N/A
Change-Id: I7a788656fe0558841523744dc5ada3a1d5ffde9b
Reviewed-on: https://chromium-review.googlesource.com/957788
Commit-Queue: Yury Khmel <khmel@google.com>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542554}