Move receive_window_ from BbrTcpSender and TcpCubicSender to

net/quic/congestion_control/tcp_cubic_sender.cc

Index: net/quic/congestion_control/tcp_cubic_sender.cc
diff --git a/net/quic/congestion_control/tcp_cubic_sender.cc b/net/quic/congestion_control/tcp_cubic_sender.cc
index 9c438d45251e535c454dc358035ba276a9a9f73a..03cf38baa7f09faed12994c204ca9c2a63e47205 100644
--- a/net/quic/congestion_control/tcp_cubic_sender.cc
+++ b/net/quic/congestion_control/tcp_cubic_sender.cc
@@ -38,7 +38,6 @@ TcpCubicSender::TcpCubicSender(
       reno_(reno),
       num_connections_(2),
       congestion_window_count_(0),
-      receive_window_(kDefaultSocketReceiveBuffer),
       prr_out_(0),
       prr_delivered_(0),
       ack_count_since_loss_(0),
@@ -72,10 +71,6 @@ void TcpCubicSender::SetFromConfig(const QuicConfig& config, bool is_server) {
                                config.ReceivedInitialCongestionWindow());
     }
   }
-  if (config.HasReceivedSocketReceiveBuffer()) {
-    // Set the initial socket receive buffer size in bytes.
-    receive_window_ = config.ReceivedSocketReceiveBuffer();
-  }
 }
 
 void TcpCubicSender::SetNumEmulatedConnections(int num_connections) {
@@ -83,14 +78,6 @@ void TcpCubicSender::SetNumEmulatedConnections(int num_connections) {
   cubic_.SetNumConnections(num_connections_);
 }
 
-void TcpCubicSender::OnIncomingQuicCongestionFeedbackFrame(
-    const QuicCongestionFeedbackFrame& feedback,
-    QuicTime feedback_receive_time) {
-  if (feedback.type == kTCP) {
-    receive_window_ = feedback.tcp.receive_window;
-  }
-}
-
 void TcpCubicSender::OnCongestionEvent(
     bool rtt_updated,
     QuicByteCount bytes_in_flight,
@@ -193,17 +180,12 @@ QuicTime::Delta TcpCubicSender::TimeUntilSend(
   if (InRecovery()) {
     return PrrTimeUntilSend(bytes_in_flight);
   }
-  if (SendWindow() > bytes_in_flight) {
+  if (GetCongestionWindow() > bytes_in_flight) {
     return QuicTime::Delta::Zero();
   }
   return QuicTime::Delta::Infinite();
 }
 
-QuicByteCount TcpCubicSender::SendWindow() const {
-  // What's the current send window in bytes.
-  return min(receive_window_, GetCongestionWindow());
-}
-
 QuicBandwidth TcpCubicSender::PacingRate() const {
   // We pace at twice the rate of the underlying sender's bandwidth estimate
   // during slow start and 1.25x during congestion avoidance to ensure pacing
@@ -352,7 +334,7 @@ QuicTime::Delta TcpCubicSender::PrrTimeUntilSend(
   if (prr_out_ == 0 || bytes_in_flight < kMaxSegmentSize) {
     return QuicTime::Delta::Zero();
   }
-  if (SendWindow() > bytes_in_flight) {
+  if (GetCongestionWindow() > bytes_in_flight) {
     // During PRR-SSRB, limit outgoing packets to 1 extra MSS per ack, instead
     // of sending the entire available window. This prevents burst retransmits
     // when more packets are lost than the CWND reduction.