[Document-parseHTMLUnsafe-url-base.html]
  [valid: created normally]
    expected: FAIL

  [valid: created using another iframe's parseHTMLUnsafe from this frame]
    expected: FAIL

  [valid: created using another iframe's parseHTMLUnsafe from that frame]
    expected: FAIL

  [invalid XML: created normally]
    expected: FAIL

  [invalid XML: created using another iframe's parseHTMLUnsafe from this frame]
    expected: FAIL

  [invalid XML: created using another iframe's parseHTMLUnsafe from that frame]
    expected: FAIL