Limit QUIC's send algorithm max CWND by the peer's receive buffer and

net/quic/congestion_control/tcp_cubic_bytes_sender.cc

Index: net/quic/congestion_control/tcp_cubic_bytes_sender.cc
diff --git a/net/quic/congestion_control/tcp_cubic_bytes_sender.cc b/net/quic/congestion_control/tcp_cubic_bytes_sender.cc
index 64737226f8c0faa95a256a0ff75399461cefb8b0..e4ea55f351b3d779e42619e660233a7bc15b8723 100644
--- a/net/quic/congestion_control/tcp_cubic_bytes_sender.cc
+++ b/net/quic/congestion_control/tcp_cubic_bytes_sender.cc
@@ -107,6 +107,11 @@ void TcpCubicBytesSender::SetNumEmulatedConnections(int num_connections) {
   cubic_.SetNumConnections(num_connections_);
 }
 
+void TcpCubicBytesSender::SetMaxCongestionWindow(
+    QuicByteCount max_congestion_window) {
+  max_congestion_window_ = max_congestion_window;
+}
+
 float TcpCubicBytesSender::RenoBeta() const {
   // kNConnectionBeta is the backoff factor after loss for our N-connection
   // emulation, which emulates the effective backoff of an ensemble of N