Repair the CWND reduction caused by spurious RTO's in QUIC's congestion

net/quic/congestion_control/pacing_sender.cc

Index: net/quic/congestion_control/pacing_sender.cc
diff --git a/net/quic/congestion_control/pacing_sender.cc b/net/quic/congestion_control/pacing_sender.cc
index 97138f767d0ec76d811e47f63fc0d92b8ecf5f48..7115571ac946bb925dc308babbe322d232b1c678 100644
--- a/net/quic/congestion_control/pacing_sender.cc
+++ b/net/quic/congestion_control/pacing_sender.cc
@@ -88,6 +88,10 @@ void PacingSender::OnRetransmissionTimeout(bool packets_retransmitted) {
   sender_->OnRetransmissionTimeout(packets_retransmitted);
 }
 
+void PacingSender::RevertRetransmissionTimeout() {
+  sender_->RevertRetransmissionTimeout();
+}
+
 QuicTime::Delta PacingSender::TimeUntilSend(
       QuicTime now,
       QuicByteCount bytes_in_flight,