Update from https://crrev.com/302630

net/quic/congestion_control/tcp_cubic_sender.h

Index: net/quic/congestion_control/tcp_cubic_sender.h
diff --git a/net/quic/congestion_control/tcp_cubic_sender.h b/net/quic/congestion_control/tcp_cubic_sender.h
index ae05ee25f9e6b1915177f2bfca176bee8349e447..749156534934c6ce09ccbd4e9af854be14de8bcf 100644
--- a/net/quic/congestion_control/tcp_cubic_sender.h
+++ b/net/quic/congestion_control/tcp_cubic_sender.h
@@ -70,6 +70,9 @@ class NET_EXPORT_PRIVATE TcpCubicSender : public SendAlgorithmInterface {
  private:
   friend class test::TcpCubicSenderPeer;
 
+  // Compute the TCP Reno beta based on the current number of connections.
+  float RenoBeta() const;
+
   // TODO(ianswett): Remove these and migrate to OnCongestionEvent.
   void OnPacketAcked(QuicPacketSequenceNumber acked_sequence_number,
                      QuicByteCount acked_bytes,