Use case

Flutter.js currently accepts only *.dart.js and flutter_service_worker.js in its trusted types policy - see:

Internally, we want to be able to pass names that don't follow the conventions specified above, so we probably should relax the default (at least until it's more easily overridable).

Proposal

Relax the default so it accepts any .js script.

As reported in b/268285339 by @jacobsimionato