As before, if it's not assigned to any one, you can assign it to yourself and just do it.
However, see https://codereview.chromium.org/2102133002. This isn't ready to land because there are some open issues with the spec on exactly what the constructors look like. And this change needs an intent to implement and ship document sent to blink-dev.
Comment 1 by hyungwoo...@navercorp.com
, Jul 25 2016