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Based on the feedback we have received from our customers, showing the infobar after detaching the extension is rarely helpful and occasionally
misleading. To alleviates some of the pain associated with displaying the infobar after detaching the extension, this CL removes the infobar
five seconds after the extension has been detached. In a separate CL, we
will update the Cancel button to be in sync with the state.

Bug: 1096262
Change-Id: I55f7b2ca13817683a9ace6cab5118731513b9478
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2386328
Commit-Queue: Ghazale Hosseinabadi <ghazale@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813344}