gfe-relnote: In QUIC, skipping a packet number, when a single PTO packet will be sent, to elicit an immediate ACK. Protected by gfe2_reloadable_flag_quic_skip_packet_number_for_pto.

PiperOrigin-RevId: 268899762
Change-Id: I5c4313b8c9b2a01392f4728bd6364071657fa0d5
diff --git a/quic/core/quic_packet_creator.h b/quic/core/quic_packet_creator.h
index 8e3ea3f..9f00842 100644
--- a/quic/core/quic_packet_creator.h
+++ b/quic/core/quic_packet_creator.h
@@ -82,6 +82,11 @@
   void UpdatePacketNumberLength(QuicPacketNumber least_packet_awaited_by_peer,
                                 QuicPacketCount max_packets_in_flight);
 
+  // Skip |count| packet numbers.
+  void SkipNPacketNumbers(QuicPacketCount count,
+                          QuicPacketNumber least_packet_awaited_by_peer,
+                          QuicPacketCount max_packets_in_flight);
+
   // The overhead the framing will add for a packet with one frame.
   static size_t StreamFramePacketOverhead(
       QuicTransportVersion version,