GitLab

To be enabled on Canary via a server-side config. Waiting for approvals
from launch review to enable on other channels due to impact to UX.

Intent to Ship:
   https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/JwSN1yEVvnk

Bug: 861704
Change-Id: Ie12abb92f52fc10ac68cc5671f7a868431902a19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1634932Reviewed-by: Nasko Oskov <nasko@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Reviewed-by: Rick Byers <rbyers@chromium.org>
Reviewed-by: Jinho Bang <jinho.bang@samsung.com>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Rouslan Solomakhin <rouslan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665025}