ew Blob(["test"]); },
        {"Content-Type": "application/xml;charset=ASCII"},
        "application/xml;charset=ASCII",
        "Blob request with unset type keeps setRequestHeader() Content-Type and charset"
      )
      request(
        function _Blob() { return new Blob(["<xml/>"], {type : "application/xml;charset=ASCII"}); },
        {"Content-Type": ""},
        "",
        'Blob request with set type respects setRequestHeader("") to be specified'
      )
      request(
        function _Blob() { re