[window-iframe-messagechannel.https.html]
  [postMessaging with a MessageChannel that's been cross-site should succeed]
    expected: FAIL

  [postMessaging to a same-site iframe via MessageChannel should fail]
    expected: FAIL

  [postMessaging to a cross-site iframe via MessageChannel should fail]
    expected: FAIL

  [postMessaging to a same-origin iframe via MessageChannel allows them to see each others' modifications]
    expected: FAIL