Move receive_window_ from BbrTcpSender and TcpCubicSender to

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 c19a43de56dc692cfef27474d41028db967d941d..c59172c01a0cd69d9b67da33e89dd602e42f8389 100644
--- a/net/quic/congestion_control/tcp_cubic_sender.h
+++ b/net/quic/congestion_control/tcp_cubic_sender.h
@@ -40,9 +40,6 @@ class NET_EXPORT_PRIVATE TcpCubicSender : public SendAlgorithmInterface {
   // Start implementation of SendAlgorithmInterface.
   void SetFromConfig(const QuicConfig& config, bool is_server) override;
   void SetNumEmulatedConnections(int num_connections) override;
-  void OnIncomingQuicCongestionFeedbackFrame(
-      const QuicCongestionFeedbackFrame& feedback,
-      QuicTime feedback_receive_time) override;
   void OnCongestionEvent(bool rtt_updated,
                          QuicByteCount bytes_in_flight,
                          const CongestionVector& acked_packets,
@@ -79,7 +76,6 @@ class NET_EXPORT_PRIVATE TcpCubicSender : public SendAlgorithmInterface {
   void OnPacketLost(QuicPacketSequenceNumber largest_loss,
                     QuicByteCount bytes_in_flight);
 
-  QuicByteCount SendWindow() const;
   void MaybeIncreaseCwnd(QuicPacketSequenceNumber acked_sequence_number,
                          QuicByteCount bytes_in_flight);
   bool IsCwndLimited(QuicByteCount bytes_in_flight) const;
@@ -103,12 +99,6 @@ class NET_EXPORT_PRIVATE TcpCubicSender : public SendAlgorithmInterface {
   // ACK counter for the Reno implementation.
   uint64 congestion_window_count_;
 
-  // Receiver side advertised window.
-  // TODO (jri): Change this variable name to receive_window_bytes_, to avoid
-  // confusion in operations with QuicPacketCount variables
-  // (eg., congestion_window_).
-  QuicByteCount receive_window_;
-
   // Bytes sent and acked since the last loss event.  Used for PRR.
   QuicByteCount prr_out_;
   QuicByteCount prr_delivered_;