GitLab

There was only one site populating these and it was not necessary (it
was already skipping population if this was a new browsing instance).

This is a pre-factor for https://crrev.com/c/2084038

Change-Id: I585160d2533fc5adfbe317a1ace2166b8a378915
Bug: 1059678
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094579Reviewed-by: Luke Halliwell (slow) <halliwell@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Alexander Timin <altimin@chromium.org>
Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Auto-Submit: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#749164}