void RecordAbortRapporOnUI(const GURL& url,
                           base::TimeDelta request_loading_time) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);
  if (request_loading_time.InMilliseconds() < 100)
    GetContentClient()->browser()->RecordURLMetric("Net.ErrAborted.Fast", url);
  else
    GetContentClient()->browser()->RecordURLMetric("Net.ErrAborted.Slow", url);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.