This is a reland of 276bab4c

Fixed to include author on the list of reviewers.

Original change's description:
> presubmit: Don't print comments for missing reviewers.
>
> Don't print owners comments when suggesting missing reviewers,
> as this won't be supported when using Gerrit API.
>
> Change-Id: I644b2f87b58a3c9ece3aa7d107100f3501bd3071
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2607675
> Commit-Queue: Josip Sokcevic <sokcevic@google.com>
> Reviewed-by: Gavin Mak <gavinmak@google.com>
> Reviewed-by: Josip Sokcevic <sokcevic@google.com>
> Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>

Change-Id: I6dfb2087022ad87595e6cabc50d42a8bdf6311b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2615918
Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>