const nsACString &contentType, const nsACString &contentCharset)
const nsACString &contentType    = EmptyCString())
NS_NewInputStreamChannel(nsIChannel      **result,                         nsIURI           *uri,                         nsIInputStream   *stream,                         const nsACString &contentType,                         const nsACString &contentCharset){    return NS_NewInputStreamChannel(result, uri, stream, contentType,                                    &contentCharset);}