Replace QuicAckListenerInterface* with scoped_refptr<QuicAckListenerInterface>.

net/quic/core/quic_session.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_session.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/quic/core/crypto/proof_verifier.h"
@@ skipping 265 matching lines @@
                                    const QuicReceivedPacket& packet) {
   connection_->ProcessUdpPacket(self_address, peer_address, packet);
 }
 
 QuicConsumedData QuicSession::WritevData(
     QuicStream* stream,
     QuicStreamId id,
     QuicIOVector iov,
     QuicStreamOffset offset,
     bool fin,
-    QuicAckListenerInterface* ack_notifier_delegate) {
+    const scoped_refptr<QuicAckListenerInterface>& ack_notifier_delegate) {
   // This check is an attempt to deal with potential memory corruption
   // in which |id| ends up set to 1 (the crypto stream id). If this happen
   // it might end up resulting in unencrypted stream data being sent.
   // While this is impossible to avoid given sufficient corruption, this
   // seems like a reasonable mitigation.
   if (id == kCryptoStreamId && stream != GetCryptoStream()) {
     QUIC_BUG << "Stream id mismatch";
     connection_->CloseConnection(
         QUIC_INTERNAL_ERROR,
         "Non-crypto stream attempted to write data as crypto stream.",
@@ skipping 562 matching lines @@
 
 size_t QuicSession::MaxAvailableStreams() const {
   return max_open_incoming_streams_ * kMaxAvailableStreamsMultiplier;
 }
 
 bool QuicSession::IsIncomingStream(QuicStreamId id) const {
   return id % 2 != next_outgoing_stream_id_ % 2;
 }
 
 }  // namespace net