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Currently when a window destroys, it is not removed from
DesksController.visible_on_all_desks_windows_. This can cause bugs
where a destroyed window is returned.

This CL changes the WorkspaceLayoutManager to remove visible on all
desks windows when they are destroyed.

Test: manual + added
Bug: 1023794
Change-Id: If2b50fe87b5356044070dfc740809f80d268c24b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2622396
Commit-Queue: Jeremy Chinsen <chinsenj@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842333}