[setrequestheader-content-type.htm]
  [ReadableStream request with under type sends no Content-Type without setRequestHeader() call]
    expected: FAIL

  [ReadableStream request keeps setRequestHeader() Content-Type and charset]
    expected: FAIL

  [setRequestHeader("") sends a blank string]
    expected: FAIL

  [setRequestHeader(" ") sends the string " "]
    expected: FAIL

  [XML Document request respects setRequestHeader("")]
    expected: FAIL

  [HTML Document request respects setRequestHeader("")]
    expected: FAIL

  [Blob request respects setRequestHeader("") to be specified]
    expected: FAIL

  [Blob request with set type respects setRequestHeader("") to be specified]
    expected: FAIL

  [ArrayBuffer request respects setRequestHeader("")]
    expected: FAIL

  [ArrayBufferView request respects setRequestHeader("")]
    expected: FAIL

  [FormData request respects setRequestHeader("")]
    expected: FAIL

  [URLSearchParams respects setRequestHeader("")]
    expected: FAIL

  [ReadableStream request respects setRequestHeader("")]
    expected: FAIL

