relnote: A small refactoring to make RecordSpuriousRetransmission() of QuicSentPacketManager simpl…

net/quic/quic_sent_packet_manager.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 #define NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 322 matching lines @@
   void MarkPacketHandled(QuicPacketNumber packet_number,
                          TransmissionInfo* info,
                          QuicTime::Delta delta_largest_observed);
 
   // Request that |packet_number| be retransmitted after the other pending
   // retransmissions.  Does not add it to the retransmissions if it's already
   // a pending retransmission.
   void MarkForRetransmission(QuicPacketNumber packet_number,
                              TransmissionType transmission_type);
 
-  // Notify observers about spurious retransmits.
+  // Notify observers that packet with TransmissionInfo |info| is a spurious
+  // retransmission. It is caller's responsibility to guarantee the packet with
+  // TransmissionInfo |info| is a spurious retransmission before calling this
+  // function.
+  void RecordOneSpuriousRetransmission(const TransmissionInfo& info);
+
+  // Notify observers about spurious retransmits of packet with TransmissionInfo
+  // |info|.
   void RecordSpuriousRetransmissions(const TransmissionInfo& info,
                                      QuicPacketNumber acked_packet_number);
 
   // Newly serialized retransmittable and fec packets are added to this map,
   // which contains owning pointers to any contained frames.  If a packet is
   // retransmitted, this map will contain entries for both the old and the new
   // packet. The old packet's retransmittable frames entry will be nullptr,
   // while the new packet's entry will contain the frames to retransmit.
   // If the old packet is acked before the new packet, then the old entry will
   // be removed from the map and the new entry's retransmittable frames will be
@@ skipping 60 matching lines @@
   // Records bandwidth from server to client in normal operation, over periods
   // of time with no loss events.
   QuicSustainedBandwidthRecorder sustained_bandwidth_recorder_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicSentPacketManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SENT_PACKET_MANAGER_H_