GitLab

The implementation of ShowUserWallpaper has been fully moved to //ash.

TBR=alemate@chromium.org, oshima@chromium.org

Bug: 779221
Test: ash_unittests, manual
Change-Id: I3c8de532228669baf56e336ad91c467407cfd9e5
Reviewed-on: https://chromium-review.googlesource.com/848311
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534150}