Remove reference counting from media::DemuxerStream and friends.

media/tools/seek_tester/seek_tester.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.
 //
 // This standalone binary is a helper for diagnosing seek behavior of the
 // demuxer setup in media/ code.  It answers the question: "if I ask the demuxer
 // to Seek to X ms, where will it actually seek to? (necessitating
 // frame-dropping until the original seek target is reached)".  Sample run:
 //
 // $ ./out/Debug/seek_tester .../LayoutTests/media/content/test.ogv 6300
@@ skipping 65 matching lines @@
   scoped_ptr<media::FFmpegDemuxer> demuxer(new media::FFmpegDemuxer(
       loop.message_loop_proxy(), file_data_source, need_key_cb));
   demuxer->Initialize(&host, quitter);
   loop.Run();
 
   demuxer->Seek(base::TimeDelta::FromMilliseconds(seek_target_ms), quitter);
   loop.Run();
 
   uint64 audio_seeked_to_ms;
   uint64 video_seeked_to_ms;
-  scoped_refptr<media::DemuxerStream> audio_stream(
-      demuxer->GetStream(media::DemuxerStream::AUDIO));
-  scoped_refptr<media::DemuxerStream> video_stream(
-      demuxer->GetStream(media::DemuxerStream::VIDEO));
+  media::DemuxerStream* audio_stream =
+      demuxer->GetStream(media::DemuxerStream::AUDIO);
+  media::DemuxerStream* video_stream =
+      demuxer->GetStream(media::DemuxerStream::VIDEO);
   LOG(INFO) << "Requested: " << seek_target_ms << "ms";
   if (audio_stream) {
     audio_stream->Read(base::Bind(
         &TimestampExtractor, &audio_seeked_to_ms, &loop));
     loop.Run();
     LOG(INFO) << "  audio seeked to: " << audio_seeked_to_ms << "ms";
   }
   if (video_stream) {
     video_stream->Read(
         base::Bind(&TimestampExtractor, &video_seeked_to_ms, &loop));
     loop.Run();
     LOG(INFO) << "  video seeked to: " << video_seeked_to_ms << "ms";
   }
 
   demuxer->Stop(base::Bind(&base::MessageLoop::Quit, base::Unretained(&loop)));
   loop.Run();
 
   return 0;
 }