[responsetext-decoding.htm]
  type: testharness
  [XMLHttpRequest: responseText decoding (text/plain %FE%FF)]
    expected: FAIL

  [XMLHttpRequest: responseText decoding (text/plain %FE%FF%FE%FF)]
    expected: FAIL

  [XMLHttpRequest: responseText decoding (text/plain %C2)]
    expected: FAIL