Fix a bug in QUIC's RTO. Flag protected by FLAGS_quic_use_new_rto.

net/quic/quic_sent_packet_manager_test.cc

Index: net/quic/quic_sent_packet_manager_test.cc
diff --git a/net/quic/quic_sent_packet_manager_test.cc b/net/quic/quic_sent_packet_manager_test.cc
index 6275094d68a6c3f55b5eafea0e9612a237b7bb17..26e5bf5deadeaf73a278726e7df8d81d8b6d9791 100644
--- a/net/quic/quic_sent_packet_manager_test.cc
+++ b/net/quic/quic_sent_packet_manager_test.cc
@@ -1127,19 +1127,21 @@ TEST_F(QuicSentPacketManagerTest, RetransmissionTimeout) {
   }
 
   // Ack a retransmission.
-  if (FLAGS_quic_use_new_rto) {
-    EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout(true));
-  }
   QuicAckFrame ack_frame;
   ack_frame.delta_time_largest_observed = QuicTime::Delta::Zero();
   ack_frame.largest_observed = 102;
   for (int i = 0; i < 102; ++i) {
     ack_frame.missing_packets.insert(i);
   }
+  // Ensure no packets are lost.
   EXPECT_CALL(*send_algorithm_,
-              OnCongestionEvent(true, _, ElementsAre(Pair(102, _)), _));
+              OnCongestionEvent(true, _, ElementsAre(Pair(102, _)),
+                                IsEmpty()) /*lost_packets=*/);
   EXPECT_CALL(*network_change_visitor_, OnCongestionWindowChange());
   EXPECT_CALL(*network_change_visitor_, OnRttChange());
+  if (FLAGS_quic_use_new_rto) {
+    EXPECT_CALL(*send_algorithm_, OnRetransmissionTimeout(true));
+  }
   manager_.OnIncomingAck(ack_frame, clock_.Now());
 }