On larger CLs, this can be used to see whether all needed LGTMs are
there on a dry run.

R=tandrii@chromium.org

Change-Id: I5fe4022feaca73d08ead9aed14ca270192740675
Reviewed-on: https://chromium-review.googlesource.com/426819
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: smut <smut@chromium.org>