GitLab

Make new permission requests to override current pending requests
and then restore pending requests in stack order.

Bug: 1019129

Change-Id: Ia7503432cceb27e4db40708c63e3e442e026595e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2418445
Commit-Queue: Olesia Marukhno <olesiamarukhno@google.com>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826839}