fix(patch): Worker should patch onProperties

[JiaLiPassion]

fix angular/angular#19334
Worker onProperties (onerror, onmessage) should also be patched.

[bvdmitri]

Safari 11.0.3 Worker has no prototype

> window['Worker']
< function WrappedWorker() {
    [native code]
}
> window['Worker'].prototype
< undefined

TypeError will be raised when getOwnPropertyDescriptor will be called with 'undefined' prototype.