WorkerGlobalScope policies not fully converted to policy containers

[ADKaster]

What is the issue with the HTML Standard?

WorkerGlobalScope has a distinct embedder policy field which is never initialized, only read.

In run a worker, the policy conatiner for the WorkerGlobalScope is initalized during processResponseConsumeBody for the worker's script. Two steps later, the uninitialized embedder policy field is read to perform some CORS checks.

check a global object's embedder policy, which applies only to WorkerGlobalScope objects, also refers directly to the WorkerGlobalScope's embedder policy, rather than its policy conatiner's embedder policy.

This feels like a straightforward cleanup? But there might be other places that are half-converted to use policy containers vs many policy fields.

[domenic]

I think this is a pretty straightforward cleanup, probably just a single instance that slipped through the cracks when introducing policy container. Would you be up for sending a PR to fix it?