GitLab

Which is what we do on the gyp side too. Going this route rather than a different BUILD.gn as there aren't a lot of files and we don't have separate components on the gyp side.

BUG=408648
TEST=none
R=brettw@chromium.org

Review URL: https://codereview.chromium.org/552053005

Cr-Commit-Position: refs/heads/master@{#294415}