gfe-relnote: Pass receive_timestamp to OnMessageAcked().

When receive timestamps are turned on and message frames are enabled, this will
make receive timestamps available to the session whenever a message is acked.

This will be used for RTP over QUIC, where ack timestamps are required for RTP's
congestion controller and media adaptation.  (The current implementation uses
QUIC like a tunnel and disables its congestion control.)

Not flag-protected: no change in behavior, just a change in what is visible
where.

PiperOrigin-RevId: 250703980
Change-Id: I01bcee29d5dfb808771c54e4fd14ebbfa8750375
diff --git a/quic/core/quic_sent_packet_manager.h b/quic/core/quic_sent_packet_manager.h
index 3df874d..787bf8d 100644
--- a/quic/core/quic_sent_packet_manager.h
+++ b/quic/core/quic_sent_packet_manager.h
@@ -481,7 +481,8 @@
   // |info| due to receipt by the peer.
   void MarkPacketHandled(QuicPacketNumber packet_number,
                          QuicTransmissionInfo* info,
-                         QuicTime::Delta ack_delay_time);
+                         QuicTime::Delta ack_delay_time,
+                         QuicTime receive_timestamp);
 
   // Request that |packet_number| be retransmitted after the other pending
   // retransmissions.  Does not add it to the retransmissions if it's already