UploadProgress
UploadProgress = '_NUP',
virtual void UploadProgress(BUrlRequest* caller, off_t bytesSent, off_t bytesTotal)
BUrlProtocolDispatchingListener::UploadProgress(BUrlRequest* caller,
BUrlProtocolListener::UploadProgress(BUrlRequest*, off_t, off_t)
BUrlSynchronousRequest::UploadProgress(BUrlRequest*, off_t bytesSent,