GitLab

Separate suspension of shelf visibility updates and work area
updates (the former is needed for desk transitions, the latter is
needed for overview transitions).

Bug: 1021691, 1017435, 1019531
Change-Id: Ie0bb64d931a06b2157a58afc2b1c8604ccf2d71c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1898718
Commit-Queue: Manu Cornet <manucornet@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714290}