Attach QuicAckNotifiers to the serialized packet, instead of individual

net/quic/quic_ack_notifier.cc

 // 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.
 
 #include "net/quic/quic_ack_notifier.h"
 
 #include <set>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 26 matching lines @@
 QuicAckNotifier::~QuicAckNotifier() {
 }
 
 void QuicAckNotifier::AddSequenceNumber(
     const QuicPacketSequenceNumber& sequence_number,
     int packet_payload_size) {
   sequence_numbers_.insert(make_pair(sequence_number,
                                      PacketInfo(packet_payload_size)));
   ++original_packet_count_;
   original_byte_count_ += packet_payload_size;
+
+  DVLOG(1) << "AckNotifier waiting for packet: " << sequence_number;
 }
 
 bool QuicAckNotifier::OnAck(QuicPacketSequenceNumber sequence_number,
                             QuicTime::Delta delta_largest_observed) {
   DCHECK(ContainsKey(sequence_numbers_, sequence_number));
   sequence_numbers_.erase(sequence_number);
   if (IsEmpty()) {
     // We have seen all the sequence numbers we were waiting for, trigger
     // callback notification.
     delegate_->OnAckNotification(
@@ skipping 15 matching lines @@
   if (it != sequence_numbers_.end()) {
     packet_info = it->second;
     sequence_numbers_.erase(it);
   } else {
     DLOG(DFATAL) << "Old sequence number not found.";
   }
 
   ++retransmitted_packet_count_;
   retransmitted_byte_count_ += packet_info.packet_payload_size;
   sequence_numbers_.insert(make_pair(new_sequence_number, packet_info));
+
+  DVLOG(1) << "AckNotifier waiting for packet: " << new_sequence_number
+           << " (retransmitted " << old_sequence_number << ").";
 }
 
 };  // namespace net