Change DemuxerStream::ReadCallback to use ref-counted buffers.

media/base/mock_reader.h

 // Copyright (c) 2011 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.
 
 #ifndef MEDIA_BASE_MOCK_READER_H_
 #define MEDIA_BASE_MOCK_READER_H_
 
 #include <string>
 
 #include "base/bind.h"
@@ skipping 32 matching lines @@
     expecting_call_ = true;
     filter->Read(base::Bind(&MockReader::OnReadComplete, this));
   }
 
   // Mock accessors.
   BufferType* buffer() { return buffer_; }
   bool called() { return called_; }
   bool expecting_call() { return expecting_call_; }
 
  private:
-  void OnReadComplete(BufferType* buffer) {
+  void OnReadComplete(const scoped_refptr<BufferType>& buffer) {
     DCHECK(!called_);
     DCHECK(expecting_call_);
     expecting_call_ = false;
     called_ = true;
     buffer_ = buffer;
   }
 
   // Reference to the buffer provided in the callback.
   scoped_refptr<BufferType> buffer_;
 
   // Whether or not the callback was executed.
   bool called_;
 
   // Whether or not this reader was expecting a callback.
   bool expecting_call_;
 
   DISALLOW_COPY_AND_ASSIGN(MockReader);
 };
 
 // Commonly used reader types.
 typedef MockReader<DemuxerStream, Buffer> DemuxerStreamReader;
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_READER_H_