GitLab

There are a couple of things still remaining, but those will be a bit
more fiddly.

TEST=covered by tests
BUG=1097644

Change-Id: If9c62187088b1fce2c432607c808b4e5b6426d9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2300623Reviewed-by: Clark DuVall <cduvall@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789112}