GitLab

Bug:
https://bugs.chromium.org/p/chromium/issues/detail?id=1066670

Design doc:
https://docs.google.com/document/d/190l8eBJrtb-8TyJZLzdRiQEH-gW1XvBVH0gWy0zHiNM/edit?usp=sharing

Chrome Eng approval:
https://groups.google.com/a/google.com/g/chrome-eng-review/c/TY2zqz7uICI/m/MwHdJv4HAQAJ

BUG=1066670

Change-Id: I4fdb7c2169a2b116cb57dec4e436aa832112dd3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2267923
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Nick Yamane <nickdiego@igalia.com>
Reviewed-by: Alex Gough <ajgo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784536}