[paymentrequest] Should we support a delegated state for PaymentRequest? (#33)

>From the spec: We believe there are user agent configurations that can cause the UI to get into a state where cancellation by the web page during user interaction is difficult. Users should still be able to cancel the payment but script will not be able to. We need to investigate in more detail the consequences of this and whether it is really needed.

If we do specify `delegated` then it isn't necessary for all user agents to be able to move to this state but it would be necessary for all payment flows that wish to call `abort()` to account for the situation where this may fail in the `delegated` state.

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Reply to this email directly or view it on GitHub:
https://github.com/WICG/paymentrequest/issues/33