[rejects_if_not_active.https.html]
  [PaymentRequest.show() aborts if the document is not active]
    expected: FAIL

  [PaymentRequest.show() aborts if the document is active, but not fully active]
    expected: FAIL

  [If a payment request is showing, but its document is navigated away (so no longer fully active), the payment request aborts.]
    expected: FAIL