GitLab

This has been on by default for quite a few releases.
It's time to remove the switches.

BUG=426656,625289

Change-Id: I25bf2f3ec3d23cf51df6aeb5a1966a168b8617ad
Reviewed-on: https://chromium-review.googlesource.com/519564Reviewed-by: Scott Graham <scottmg@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476367}