Adds a varz variable to track the fraction of times we end up in cubic

net/quic/quic_connection_stats.cc

 // 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.
 
 #include "net/quic/quic_connection_stats.h"
 
 using std::ostream;
 
 namespace net {
 
 QuicConnectionStats::QuicConnectionStats()
     : bytes_sent(0),
       packets_sent(0),
       stream_bytes_sent(0),
       bytes_received(0),
       packets_received(0),
       stream_bytes_received(0),
       bytes_retransmitted(0),
       packets_retransmitted(0),
       packets_spuriously_retransmitted(0),
       packets_lost(0),
       packets_revived(0),
       packets_dropped(0),
       crypto_retransmit_count(0),
       loss_timeout_count(0),
       tlp_count(0),
       rto_count(0),
       rtt(0),
       estimated_bandwidth(0),
-      cwnd_increase_cubic_mode(0),
-      cwnd_increase_reno_mode(0) {
+      cwnd_increase_congestion_avoidance(0),
+      cwnd_increase_cubic_mode(0) {
 }
 
 QuicConnectionStats::~QuicConnectionStats() {}
 
 ostream& operator<<(ostream& os, const QuicConnectionStats& s) {
   os << "{ bytes sent: " << s.bytes_sent
      << ", packets sent:" << s.packets_sent
      << ", stream bytes sent: " << s.stream_bytes_sent
      << ", bytes received: " << s.bytes_received
      << ", packets received: " << s.packets_received
      << ", stream bytes received: " << s.stream_bytes_received
      << ", bytes retransmitted: " << s.bytes_retransmitted
      << ", packets retransmitted: " << s.packets_retransmitted
      << ", packets_spuriously_retransmitted: "
      << s.packets_spuriously_retransmitted
      << ", packets lost: " << s.packets_lost
      << ", packets revived: " << s.packets_revived
      << ", packets dropped:" << s.packets_dropped
      << ", crypto retransmit count: " << s.crypto_retransmit_count
      << ", rto count: " << s.rto_count
      << ", tlp count: " << s.tlp_count
      << ", rtt(us): " << s.rtt
      << ", estimated_bandwidth: " << s.estimated_bandwidth
+     << ", total amount of cwnd increase in TCPCubic, in congestion avoidance: "
+     << s.cwnd_increase_congestion_avoidance
      << ", amount of cwnd increase in TCPCubic, in cubic mode: "
      << s.cwnd_increase_cubic_mode
-     << ", amount of cwnd increase in TCPCubic, matched by or in reno mode: "
-     << s.cwnd_increase_reno_mode
      << "}\n";
   return os;
 }
 
 }  // namespace net