GitLab

Allow Linux files directories as a downloads location as per
Android files in crosreview.com/1144992.

Bug: 863610
Change-Id: I5ddea45452ffd172231cf5516fc376ed6426e86c
Reviewed-on: https://chromium-review.googlesource.com/1158454Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579947}