[window-reuse-in-nested-browsing-contexts.tentative.html]
  [synchronously navigate iframe with no initial src.]
    expected: FAIL

  [after the first iframe load event, navigate iframe with no initial src.]
    expected: FAIL

  [synchronously navigate iframe with initial src == "about:blank".]
    expected: FAIL

  [iframe with initial src == same-origin resource.]
    expected: FAIL

  [synchronously navigate iframe with initial src == "".]
    expected: FAIL