Use byte conservation instead of packet conservation in QUIC's Slow Start Large Recovery experiment…

net/quic/quic_connection_stats.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_CONNECTION_STATS_H_
 #define NET_QUIC_QUIC_CONNECTION_STATS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 36 matching lines @@
 
   QuicByteCount bytes_spuriously_retransmitted;
   QuicPacketCount packets_spuriously_retransmitted;
   // Number of packets abandoned as lost by the loss detection algorithm.
   QuicPacketCount packets_lost;
 
   // Number of packets sent in slow start.
   QuicPacketCount slowstart_packets_sent;
   // Number of packets lost exiting slow start.
   QuicPacketCount slowstart_packets_lost;
+  // Number of bytes lost exiting slow start.
+  QuicByteCount slowstart_bytes_lost;
 
   QuicPacketCount packets_dropped;  // Duplicate or less than least unacked.
   size_t crypto_retransmit_count;
   // Count of times the loss detection alarm fired.  At least one packet should
   // be lost when the alarm fires.
   size_t loss_timeout_count;
   size_t tlp_count;
   size_t rto_count;  // Count of times the rto timer fired.
 
   int64_t min_rtt_us;  // Minimum RTT in microseconds.
@@ skipping 15 matching lines @@
   // one or more lost packets.
   uint32_t tcp_loss_events;
 
   // Creation time, as reported by the QuicClock.
   QuicTime connection_creation_time;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_STATS_H_