GitLab

Design Doc: https://docs.google.com/document/d/1BBtBPTarOF4NeVKSWZe3XaDHo4yTGhdlqYm35yVzPs4/edit#

Bug: 846618
Change-Id: I15903843b0377c45db9caf3d54914ed942caf361
Reviewed-on: https://chromium-review.googlesource.com/1098742
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568767}