This is a reland of 989285b7

Original change's description:
> [tools] Add benchmark owners to the config
>
> R=machenbach@chromium.org
>
> No-Try: true
> Bug: chromium:826280
> Change-Id: Ic34d13170dfecdd9e791974a34c33ba0248c7a38
> Reviewed-on: https://chromium-review.googlesource.com/1053809
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53138}

R=machenbach@chromium.org

No-Try: true
Bug: chromium:826280
Change-Id: Ie61892c80d5ce004703d3e769abd58c4f2af1eec
Reviewed-on: https://chromium-review.googlesource.com/1057092Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53212}