Replace QuicAckListenerInterface* with scoped_refptr<QuicAckListenerInterface>.

net/quic/quartc/quartc_stream_test.cc

 // Copyright (c) 2016 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/quartc/quartc_stream.h"
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "net/quic/core/crypto/quic_random.h"
 #include "net/quic/core/quic_session.h"
 #include "net/quic/core/quic_simple_buffer_allocator.h"
@@ skipping 20 matching lines @@
       : QuicSession(connection, nullptr /*visitor*/, config),
         write_buffer_(write_buffer) {}
 
   // Writes outgoing data from QuicStream to a string.
   QuicConsumedData WritevData(
       QuicStream* stream,
       QuicStreamId id,
       QuicIOVector iovector,
       QuicStreamOffset offset,
       bool fin,
-      QuicAckListenerInterface* ack_notifier_delegate) override {
+      const scoped_refptr<QuicAckListenerInterface>& /*ack_notifier_delegate*/)
+      override {
     if (!writable_) {
       return QuicConsumedData(0, false);
     }
 
     const char* data = reinterpret_cast<const char*>(iovector.iov->iov_base);
     size_t len = iovector.total_length;
     write_buffer_->append(data, len);
     return QuicConsumedData(len, fin);
   }
 
@@ skipping 203 matching lines @@
 TEST_F(QuartcStreamTest, CloseStream) {
   CreateReliableQuicStream();
   EXPECT_FALSE(mock_stream_delegate_->closed());
   stream_->OnClose();
   EXPECT_TRUE(mock_stream_delegate_->closed());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net