Robert Iannucci a4dec94a1a Add download_archive to gitiles module.
R=phosek@chromium.org, tandrii@chromium.org, vadimsh@chromium.org

Bug: 790650
Change-Id: Ia878004d6983dbbad882ec683da2e0db5e727c66
Reviewed-on: https://chromium-review.googlesource.com/1116073
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
..
full.expected Add download_archive to gitiles module.
full.py Add download_archive to gitiles module.