GitLab

Design doc: https://docs.google.com/document/d/1kzQRLybaUk12UgG8YTyACwNZ7tpcXwdjzPXU3CV25J8/edit

Bug: 863305
Change-Id: Ibdfbd06dc354894c2ef92db878828d171adaa75f
Reviewed-on: https://chromium-review.googlesource.com/1226758Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Kunihiko Sakamoto <ksakamoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592659}