[sandboxed_FileSystemBaseHandle-postMessage-frames.tentative.https.window.html]
  [Send and receive messages using a sandboxed same origin iframe.]
    expected: FAIL

  [Send and receive messages using an iframe srcdoc.]
    expected: FAIL

  [Send and receive messages using a same origin iframe.]
    expected: FAIL

  [Send and receive messages using a blob iframe.]
    expected: FAIL

