Remove QuicSentPacketManager::DebugVisitor's OnSentPacket, since it's

net/quic/quic_sent_packet_manager.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_sent_packet_manager.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 485 matching lines @@
     SerializedPacket* serialized_packet,
     QuicPacketSequenceNumber original_sequence_number,
     QuicTime sent_time,
     QuicByteCount bytes,
     TransmissionType transmission_type,
     HasRetransmittableData has_retransmittable_data) {
   QuicPacketSequenceNumber sequence_number = serialized_packet->sequence_number;
   DCHECK_LT(0u, sequence_number);
   DCHECK(!unacked_packets_.IsUnacked(sequence_number));
   LOG_IF(DFATAL, bytes == 0) << "Cannot send empty packets.";
-  if (debug_delegate_ != nullptr) {
-    debug_delegate_->OnSentPacket(*serialized_packet,
-                                  original_sequence_number,
-                                  sent_time,
-                                  bytes,
-                                  transmission_type);
-  }
 
   if (original_sequence_number == 0) {
     if (serialized_packet->retransmittable_frames) {
       ack_notifier_manager_.OnSerializedPacket(*serialized_packet);
     }
     unacked_packets_.AddPacket(*serialized_packet);
     serialized_packet->retransmittable_frames = nullptr;
   } else {
     OnRetransmittedPacket(original_sequence_number, sequence_number);
   }
@@ skipping 357 matching lines @@
 
   // Set up a pacing sender with a 5 millisecond alarm granularity.
   using_pacing_ = true;
   send_algorithm_.reset(
       new PacingSender(send_algorithm_.release(),
                        QuicTime::Delta::FromMilliseconds(5),
                        kInitialUnpacedBurst));
 }
 
 }  // namespace net