Replace QuicAckListenerInterface* with scoped_refptr<QuicAckListenerInterface>.

net/quic/core/quic_spdy_session.cc

 // Copyright (c) 2015 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_spdy_session.h"
 
 #include <utility>
 
 #include "net/quic/core/quic_bug_tracker.h"
 #include "net/quic/core/quic_headers_stream.h"
@@ skipping 56 matching lines @@
     return;
   }
   stream->OnStreamHeaderList(fin, frame_len, header_list);
 }
 
 size_t QuicSpdySession::WriteHeaders(
     QuicStreamId id,
     SpdyHeaderBlock headers,
     bool fin,
     SpdyPriority priority,
-    QuicAckListenerInterface* ack_notifier_delegate) {
+    const scoped_refptr<QuicAckListenerInterface>& ack_notifier_delegate) {
   return headers_stream_->WriteHeaders(id, std::move(headers), fin, priority,
                                        ack_notifier_delegate);
 }
 
 void QuicSpdySession::OnHeadersHeadOfLineBlocking(QuicTime::Delta delta) {
   // Implemented in Chromium for stats tracking.
 }
 
 void QuicSpdySession::RegisterStreamPriority(QuicStreamId id,
                                              SpdyPriority priority) {
@@ skipping 71 matching lines @@
   DVLOG(1) << "De-encapsulating DATA frame for stream " << stream_id
            << " offset " << offset << " len " << len << " fin " << fin;
   OnStreamFrame(frame);
 }
 
 bool QuicSpdySession::ShouldReleaseHeadersStreamSequencerBuffer() {
   return false;
 }
 
 }  // namespace net