[heycam/webidl] [[Call]] for objects w/o legacycaller (#408)

For legacy platform objects w/o any legacy callers, the [[Call]] internal method [immediately](https://heycam.github.io/webidl/#legacy-platform-object-call) throws a TypeError. Unfortunately, the mere fact that [[Call]] is defined can cause certain issues, like the object being treated as [callable](https://tc39.github.io/ecma262/#sec-iscallable) by ES, and [`typeof` operator](https://tc39.github.io/ecma262/#sec-typeof-operator) returning "function".

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/heycam/webidl/issues/408