Looks like this is probably fallout from disabling "private" CLs.

This still appears to be broken. Do we plan on fixing this?

--draft == --private, and support for private CLs has been disabled in Chromium GoB instances by server config (see the 'PSA: "private" CLs on Gerrit are no more' threads on chromium-dev/chromium-os-dev), so probably no, nothing is going to change here

From the thread on chromiumos-dev, it sounded like there *might've* been some desire to reenable the feature, but it wasn't clear to me that there was a consensus to do so.

So, unless something changes, I agree with vapier@ and we're likely to leave this off.