QUIC test only change to add track the observed loss rate in

net/quic/congestion_control/send_algorithm_simulator.h

Index: net/quic/congestion_control/send_algorithm_simulator.h
diff --git a/net/quic/congestion_control/send_algorithm_simulator.h b/net/quic/congestion_control/send_algorithm_simulator.h
index 4234e66157b0b0e355b3ff6a0cb1001fdfc81f75..4ecb83338fdb04a5ce2ea0dd0f28bcf0507dd05d 100644
--- a/net/quic/congestion_control/send_algorithm_simulator.h
+++ b/net/quic/congestion_control/send_algorithm_simulator.h
@@ -40,10 +40,13 @@ class SendAlgorithmSimulator {
     }
 
     std::string DebugString() {
-      return StringPrintf("observed goodput(bytes/s):%" PRId64 " cwnd:%" PRIu64
+      return StringPrintf("observed goodput(bytes/s):%" PRId64
+                          " loss rate:%f"
+                          " cwnd:%" PRIu64
                           " max_cwnd:%" PRIu64 " min_cwnd:%" PRIu64
                           " max_cwnd_drop:%" PRIu64,
                           last_transfer_bandwidth.ToBytesPerSecond(),
+                          last_transfer_loss_rate,
                           send_algorithm->GetCongestionWindow(),
                           max_cwnd, min_cwnd, max_cwnd_drop);
     }
@@ -65,6 +68,7 @@ class SendAlgorithmSimulator {
     QuicByteCount last_cwnd;
 
     QuicBandwidth last_transfer_bandwidth;
+    float last_transfer_loss_rate;
   };
 
   struct Transfer {
@@ -72,12 +76,14 @@ class SendAlgorithmSimulator {
         : sender(sender),
           num_bytes(num_bytes),
           bytes_acked(0),
+          bytes_lost(0),
           bytes_in_flight(0),
           start_time(start_time) {}
 
     Sender* sender;
     QuicByteCount num_bytes;
     QuicByteCount bytes_acked;
+    QuicByteCount bytes_lost;
     QuicByteCount bytes_in_flight;
     QuicTime start_time;
   };