GitLab

Originally landed here: https://codereview.chromium.org/845373002/
Reverted here: https://codereview.chromium.org/1020863007/
because it caused issues on memory bots.

BUG=287883
TBR=rogerta@chromium.org (already reviewed in original CL, there are no changes here)

Review URL: https://codereview.chromium.org/1038423004

Cr-Commit-Position: refs/heads/master@{#324227}