message: Report total number of bytes to be transferred when the curl request makes no progress.
diff: @@ -512,8 +512,10 @@ int CurlHttpRequest::ProgressCallback(void* this_object, curl_off_t dltotal,
  }
  if (now - that->last_progress_timestamp_ > kInactivityTimeoutSeconds) {
  - LOG(ERROR) << "The transmission has been stuck at " << current_progress
  - << " bytes for " << now - that->last_progress_timestamp_
  + LOG(ERROR) << "The transmission of request " << this_object
  + << " has been stuck at " << current_progress << " of "
  + << dltotal + ultotal << " bytes for "
  + << now - that->last_progress_timestamp_
  << " seconds and will be aborted.";
  return 1; // Will abort the request.
  }
  