Prevent any @chromium.org or @google.com account from adding a patch to an existing review unless they are the owner, a collaborator, or an admin. Also, prevent them from editing any issue, because they could just add themselves as an uninvited COLLABORATOR.
Prevent any @chromium.org or @google.com account from adding a patch
to an existing review unless they are the owner, a collaborator, or an
admin. Also, prevent them from editing any issue, because they could
just add themselves as an uninvited COLLABORATOR.

Any @chromium.org or @google.com account can still view any issue. If
they want to pair-program, they just need the issue owner to name them
on a COLLABORATOR line.

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra