Add a kBYTE congestion option to QUIC to negotiate the TcpCubicBytesSender.

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 76fb1b52e836fed5d66a458b38453e6bf5ada189..5f977e0817ad7fcb74cf25ef30b9811c7eca0398 100644
--- a/net/quic/quic_sent_packet_manager_test.cc
+++ b/net/quic/quic_sent_packet_manager_test.cc
@@ -1472,6 +1472,25 @@ TEST_F(QuicSentPacketManagerTest, NegotiateCongestionControlFromOptions) {
   EXPECT_EQ(kBBR, QuicSentPacketManagerPeer::GetSendAlgorithm(
       manager_)->GetCongestionControlType());
 #endif
+
+  options.clear();
+  options.push_back(kBYTE);
+  QuicConfigPeer::SetReceivedConnectionOptions(&config, options);
+  EXPECT_CALL(*network_change_visitor_, OnCongestionWindowChange());
+  EXPECT_CALL(*network_change_visitor_, OnRttChange());
+  manager_.SetFromConfig(config);
+  EXPECT_EQ(kCubicBytes, QuicSentPacketManagerPeer::GetSendAlgorithm(manager_)
+                             ->GetCongestionControlType());
+
+  options.clear();
+  options.push_back(kRENO);
+  options.push_back(kBYTE);
+  QuicConfigPeer::SetReceivedConnectionOptions(&config, options);
+  EXPECT_CALL(*network_change_visitor_, OnCongestionWindowChange());
+  EXPECT_CALL(*network_change_visitor_, OnRttChange());
+  manager_.SetFromConfig(config);
+  EXPECT_EQ(kRenoBytes, QuicSentPacketManagerPeer::GetSendAlgorithm(manager_)
+                            ->GetCongestionControlType());
 }
 
 TEST_F(QuicSentPacketManagerTest, NegotiateNumConnectionsFromOptions) {