Replace QuicAckListenerInterface* with scoped_refptr<QuicAckListenerInterface>.

net/quic/core/quic_connection.cc

 // Copyright (c) 2012 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/core/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 1098 matching lines @@
   }
 
   pending_version_negotiation_packet_ = false;
 }
 
 QuicConsumedData QuicConnection::SendStreamData(
     QuicStreamId id,
     QuicIOVector iov,
     QuicStreamOffset offset,
     bool fin,
-    QuicAckListenerInterface* listener) {
+    const scoped_refptr<QuicAckListenerInterface>& listener) {
   if (!fin && iov.total_length == 0) {
     QUIC_BUG << "Attempt to send empty stream frame";
     return QuicConsumedData(0, false);
   }
 
   // Opportunistically bundle an ack with every outgoing packet.
   // Particularly, we want to bundle with handshake packets since we don't know
   // which decrypter will be used on an ack packet following a handshake
   // packet (a handshake packet from client to server could result in a REJ or a
   // SHLO from the server, leading to two different decrypters at the server.)
@@ skipping 1328 matching lines @@
 
 void QuicConnection::CheckIfApplicationLimited() {
   if (queued_packets_.empty() &&
       !sent_packet_manager_->HasPendingRetransmissions() &&
       !visitor_->WillingAndAbleToWrite()) {
     sent_packet_manager_->OnApplicationLimited();
   }
 }
 
 }  // namespace net