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This reverts commit 55a4bb68.

Reason for revert: Causing crashes - crbug.com/1016233

Original change's description:
> Kill quiet permission requests if a new request is made
> 
> Bug: 1014026
> Change-Id: I5fe93b9bc7b39873900d9e15dcba66dfddd7c4ef
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1860015
> Commit-Queue: Andy Paicu <andypaicu@chromium.org>
> Reviewed-by: Balazs Engedy <engedy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#706445}

TBR=engedy@chromium.org,andypaicu@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1014026
Change-Id: I4e0f0120e3f7d2b9711d122bb186012c5d06464d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1871632Reviewed-by: Ben Mason <benmason@chromium.org>
Commit-Queue: Ben Mason <benmason@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707899}