Unify Permission Blacklisting, automatic block on repeated permission prompt dismissal, etc, under a consistent scheme where a site can be "embargoed" from making a permission request for a short period of time. Once the "embargo" expires, the site will be allowed to make a new permission request, but it may be "re-embargoed" if it has not managed to improve its status.
For example, a requesting site may appear on Safe Browsing's permission API blacklist. Chrome would "embargo" this site for a period of time, after which the blacklist would be checked again. If the site still appears on the blacklist, it will remain "embargoed", otherwise it will be permitted to make a permission request.
Comment 1 by meredithl@google.com
, Jan 10 2017