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This is a reland of 42b45514

Original change's description:
> Notifications: Delay closing out of workarea bounds pop-ups.
> 
> When the pop-up is expanded to show inline settings, the new height can overflow
> the work area. Deleting the pop-up in this scenario triggers a crash as we're
> still in the same call stack.
> 
> BUG=957033
> 
> Change-Id: Ie8d4db393893b662b72f9c04317f9ca640a25607
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1600155
> Commit-Queue: Tim Song <tengs@chromium.org>
> Reviewed-by: Peter Boström <pbos@chromium.org>
> Reviewed-by: Peter Beverloo <peter@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#658793}

Bug: 957033
Change-Id: Id9209d2a648b234f933dbbf9de908a193b4b61df
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1609665Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: Tim Song <tengs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659239}