GitLab

And also freshen up the doc in general.

Change-Id: Icb783a45d2f418db9147042f6af1977af6eeba29
Reviewed-on: https://chromium-review.googlesource.com/c/1288954
Commit-Queue: agrieve <agrieve@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601562}