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Open the application select menu of chrome shortcut will trigger the
window stacking change. It will update the shelf visibility before
showing the menu. Call UpdateVisibilityState after the menu is shown
to keep the auto-hide shelf shown.

Bug: 908681
Change-Id: I1e4dca91a03ca85df5ddb1511bd2b4f3fe6c8d63
Reviewed-on: https://chromium-review.googlesource.com/c/1356595
Commit-Queue: Min Chen <minch@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613320}