GitLab

- Adds persistent downloads's flag.

Bug: 1013072
Change-Id: Ic5db8f631d0740748807434fddb52ba1da5505f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1852086
Commit-Queue: Ewann Pellé <ewannpv@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712966}