Get21CumulativeHistogram  694 net/quic/quic_connection_logger.cc       Get21CumulativeHistogram("Some21s_");
Get21CumulativeHistogram  696 net/quic/quic_connection_logger.cc       Get21CumulativeHistogram("First21_");
Get21CumulativeHistogram   83 net/quic/quic_connection_logger.h   base::HistogramBase* Get21CumulativeHistogram(const char* which_21) const;