GitLab

Modernize it.
Add unit test.

Bug: 860581
Change-Id: I136f85f234a843321b49976659f37aa2865ba318
Reviewed-on: https://chromium-review.googlesource.com/1139844
Commit-Queue: Alexey Baskakov <loyso@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575581}