QUIC-local change to extend per-connection stats. Extending

net/quic/quic_connection_stats.h

Index: net/quic/quic_connection_stats.h
diff --git a/net/quic/quic_connection_stats.h b/net/quic/quic_connection_stats.h
index 8c3318d37a138cc751f719e93082cfb250697739..d2ff52a4a1f9caf88aa55c2dabbc4cf0e5130ce7 100644
--- a/net/quic/quic_connection_stats.h
+++ b/net/quic/quic_connection_stats.h
@@ -53,6 +53,14 @@ struct NET_EXPORT_PRIVATE QuicConnectionStats {
 
   uint32 rtt;  // In microseconds
   uint64 estimated_bandwidth;
+
+  // The following stats are used only in TcpCubicSender.
+  // Total amount of cwnd increase by TCPCubic in cubic mode.
+  uint32 cwnd_increase_cubic_mode;
+  // Total amount of cwnd increase by TCPCubic in reno mode. This includes
+  // cwnd increases that actually happened in cubic mode, but where reno mode
+  // would have yielded the same increase.
+  uint32 cwnd_increase_reno_mode;
   // TODO(satyamshekhar): Add window_size, mss and mtu.
 };