GitLab

This prevents focus from disappearing (since signing in opens, and
later closes, a new tab).

Bug: 924921
Change-Id: I5fbab1a8bec1b0623fca33dc889f401099499ae4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1654354Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#668570}