relnote: Use event_time instead of ApproximateNow() in QUIC cubic code. Protected by --quic_use_eve…

net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc

Index: net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
diff --git a/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc b/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
index ce656036bb5a237631acf8207830cc6257ebbbf9..2ed7acd26a9f1007c7be6990792fdcb7826d767b 100644
--- a/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
+++ b/net/quic/core/congestion_control/tcp_cubic_sender_bytes.cc
@@ -157,7 +157,8 @@ QuicByteCount TcpCubicSenderBytes::GetSlowStartThreshold() const {
 void TcpCubicSenderBytes::MaybeIncreaseCwnd(
     QuicPacketNumber acked_packet_number,
     QuicByteCount acked_bytes,
-    QuicByteCount prior_in_flight) {
+    QuicByteCount prior_in_flight,
+    QuicTime event_time) {
   QUIC_BUG_IF(InRecovery()) << "Never increase the CWND during recovery.";
   // Do not increase the congestion window unless the sender is close to using
   // the current window.
@@ -191,10 +192,10 @@ void TcpCubicSenderBytes::MaybeIncreaseCwnd(
              << " slowstart threshold: " << slowstart_threshold_
              << " congestion window count: " << num_acked_packets_;
   } else {
-    congestion_window_ =
-        std::min(max_congestion_window_,
-                 cubic_.CongestionWindowAfterAck(
-                     acked_bytes, congestion_window_, rtt_stats_->min_rtt()));
+    congestion_window_ = std::min(
+        max_congestion_window_,
+        cubic_.CongestionWindowAfterAck(acked_bytes, congestion_window_,
+                                        rtt_stats_->min_rtt(), event_time));
     DVLOG(1) << "Cubic; congestion window: " << congestion_window_
              << " slowstart threshold: " << slowstart_threshold_;
   }