GitLab

Per UX requirement, if the user doesn't interact with proactive
suggestions within 15sec, the widget should automatically be closed.

Bug: b:139199754
Change-Id: I77d398a4d6d376b2ee3aadf4888da3fb764ee77a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1772481
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690960}