-- Simon Pieters Opera Software
http://www.whatwg.org/specs/web-workers/current-work/#interface-objects-and-constructors
seems to say that there must be no interface object for Worker and
SharedWorker, but the constructors are to be available, which doesn't make
any sense since the constructor and the interface object are in fact the
same object, unless I'm misunderstanding things.
- [whatwg] Interface object vs constructor in Web Workers Simon Pieters