GitLab

This test sometimes hangs on Fuchsia, so add diagnostics to show us
where.

Bug: 959245
Change-Id: Id09d68d089fcf7eac1fbe6b2fe760767ad337c6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614707
Auto-Submit: Wez <wez@chromium.org>
Reviewed-by: Eric Roman <eroman@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660614}