Re: [w3c/ServiceWorker] should blob URLs inherit controller from parent environment or environment that called `createObjectURL()`? (#1261)

So I would expect a cross-origin blob URL to fail to create a worker and the controller inheritance is moot.

For an iframe created from a cross-origin blob URL I would expect it to get the cross-origin.  It seems like it cannot inherit the controller from the parent, though, because then the SW controller's origin would not match the controlled client's origin.  It seems to me it should either get the controller from the context that called createObjectURL() or no controller.

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