Replace QuicAckListenerInterface* with scoped_refptr<QuicAckListenerInterface>.

net/quic/test_tools/quic_stream_peer.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/test_tools/quic_stream_peer.h"
 
 #include <list>
 
 #include "net/quic/core/quic_stream.h"
 
@@ skipping 70 matching lines @@
 bool QuicStreamPeer::StreamContributesToConnectionFlowControl(
     QuicStream* stream) {
   return stream->stream_contributes_to_connection_flow_control_;
 }
 
 // static
 void QuicStreamPeer::WriteOrBufferData(
     QuicStream* stream,
     StringPiece data,
     bool fin,
-    QuicAckListenerInterface* ack_notifier_delegate) {
+    const scoped_refptr<QuicAckListenerInterface>& ack_notifier_delegate) {
   stream->WriteOrBufferData(data, fin, ack_notifier_delegate);
 }
 
 // static
 net::QuicStreamSequencer* QuicStreamPeer::sequencer(QuicStream* stream) {
   return &(stream->sequencer_);
 }
 
 }  // namespace test
 }  // namespace net