Further cleanup to QuicAckNotifier and QuicAckNotifierManager.

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 15 matching lines @@
   DCHECK(delegate);
 }
 
 QuicAckNotifier::~QuicAckNotifier() {
 }
 
 void QuicAckNotifier::OnSerializedPacket() {
   ++unacked_packets_;
 }
 
-bool QuicAckNotifier::OnAck(QuicPacketSequenceNumber sequence_number,
-                            QuicTime::Delta delta_largest_observed) {
+bool QuicAckNotifier::OnAck(QuicTime::Delta delta_largest_observed) {
   if (unacked_packets_ <= 0) {
     LOG(DFATAL) << "Acked more packets than were tracked."
                 << " unacked_packets:" << unacked_packets_;
     return true;
   }
   --unacked_packets_;
   if (!HasUnackedPackets()) {
     // We have seen all the sequence numbers we were waiting for, trigger
     // callback notification.
     delegate_->OnAckNotification(retransmitted_packet_count_,
@@ skipping 13 matching lines @@
   --unacked_packets_;
   return unacked_packets_ == 0;
 }
 
 void QuicAckNotifier::OnPacketRetransmitted(int packet_payload_size) {
   ++retransmitted_packet_count_;
   retransmitted_byte_count_ += packet_payload_size;
 }
 
 };  // namespace net