GitLab

Design doc:
https://docs.google.com/document/d/1i7_1VkjJ2x86BXWocK4ZuEVq_DzdYRslt2ihJ2UdlZk

Screenshot: https://drive.google.com/a/chromium.org/file/d/1qGcgcNF3vCjb0cjkkrO_Sox9OEOSQtXo

Bug: 788872
Change-Id: Ib09a31a3914aa9b244e9e6117e1cc501a102e82c
Reviewed-on: https://chromium-review.googlesource.com/791910
Commit-Queue: Thanh Le <thanhdle@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521440}