Add a QUIC connection option, 'NTLP', to disable tail loss probes by

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 62cf8c98dda57d5e01700083fb627f3dfd4c77a3..9d616ec8bca407f84ced9ed342362782ca5389ba 100644
--- a/net/quic/quic_sent_packet_manager_test.cc
+++ b/net/quic/quic_sent_packet_manager_test.cc
@@ -1355,6 +1355,35 @@ TEST_F(QuicSentPacketManagerTest, NegotiateNumConnectionsFromOptions) {
   manager_.SetFromConfig(client_config);
 }
 
+TEST_F(QuicSentPacketManagerTest, NegotiateNoTLPFromOptionsAtServer) {
+  QuicConfig config;
+  QuicTagVector options;
+
+  options.push_back(kNTLP);
+  QuicConfigPeer::SetReceivedConnectionOptions(&config, options);
+  EXPECT_CALL(*network_change_visitor_, OnCongestionWindowChange(_));
+  EXPECT_CALL(*send_algorithm_, GetCongestionWindow())
+      .WillOnce(Return(100 * kDefaultTCPMSS));
+  EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
+  manager_.SetFromConfig(config);
+  EXPECT_EQ(0u, QuicSentPacketManagerPeer::GetMaxTailLossProbes(&manager_));
+}
+
+TEST_F(QuicSentPacketManagerTest, NegotiateNoTLPFromOptionsAtClient) {
+  QuicConfig client_config;
+  QuicTagVector options;
+
+  options.push_back(kNTLP);
+  QuicSentPacketManagerPeer::SetIsServer(&manager_, false);
+  client_config.SetConnectionOptionsToSend(options);
+  EXPECT_CALL(*network_change_visitor_, OnCongestionWindowChange(_));
+  EXPECT_CALL(*send_algorithm_, GetCongestionWindow())
+      .WillOnce(Return(100 * kDefaultTCPMSS));
+  EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
+  manager_.SetFromConfig(client_config);
+  EXPECT_EQ(0u, QuicSentPacketManagerPeer::GetMaxTailLossProbes(&manager_));
+}
+
 TEST_F(QuicSentPacketManagerTest, NegotiatePacingFromOptions) {
   EXPECT_FALSE(manager_.using_pacing());