Land Recent QUIC Changes.

net/quic/congestion_control/send_algorithm_interface.h

Index: net/quic/congestion_control/send_algorithm_interface.h
diff --git a/net/quic/congestion_control/send_algorithm_interface.h b/net/quic/congestion_control/send_algorithm_interface.h
index 44c943f044fc363b41b5b06efa6f83fd3b5e2837..35460dad99d38c9d71ffca72e507fee137839256 100644
--- a/net/quic/congestion_control/send_algorithm_interface.h
+++ b/net/quic/congestion_control/send_algorithm_interface.h
@@ -82,8 +82,9 @@ class NET_EXPORT_PRIVATE SendAlgorithmInterface {
                             TransmissionType transmission_type,
                             HasRetransmittableData is_retransmittable) = 0;
 
-  // Called when the retransmission timeout fires.
-  virtual void OnRetransmissionTimeout() = 0;
+  // Called when the retransmission timeout fires.  Neither OnPacketAbandoned
+  // nor OnPacketLost will be called for these packets.
+  virtual void OnRetransmissionTimeout(bool packets_retransmitted) = 0;
 
   // Called when a packet is timed out.
   virtual void OnPacketAbandoned(QuicPacketSequenceNumber sequence_number,