GitLab

The CI builder has the config but it's lacking on try builder.

Bug: None
Change-Id: Ibe2c784a3f0672a5df7690a3358a25c0abe3f40c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373445Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801246}