Remove reference counting from media::Demuxer and friends.

media/base/demuxer.h

 // 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.
 
 #ifndef MEDIA_BASE_DEMUXER_H_
 #define MEDIA_BASE_DEMUXER_H_
 
-#include "base/memory/ref_counted.h"
 #include "base/time.h"
 #include "media/base/data_source.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 
 namespace media {
 
 class MEDIA_EXPORT DemuxerHost : public DataSourceHost {
  public:
   // Sets the duration of the media in microseconds.
   // Duration may be kInfiniteDuration() if the duration is not known.
   virtual void SetDuration(base::TimeDelta duration) = 0;
 
   // Stops execution of the pipeline due to a fatal error.  Do not call this
   // method with PIPELINE_OK.
   virtual void OnDemuxerError(PipelineStatus error) = 0;
 
  protected:
   virtual ~DemuxerHost();
 };
 
-class MEDIA_EXPORT Demuxer : public base::RefCountedThreadSafe<Demuxer> {
+class MEDIA_EXPORT Demuxer {
  public:
   Demuxer();
+  virtual ~Demuxer();
 
   // Completes initialization of the demuxer.
   //
   // The demuxer does not own |host| as it is guaranteed to outlive the
   // lifetime of the demuxer. Don't delete it!
   virtual void Initialize(DemuxerHost* host,
                           const PipelineStatusCB& status_cb) = 0;
 
   // The pipeline playback rate has been changed.  Demuxers may implement this
   // method if they need to respond to this call.
   virtual void SetPlaybackRate(float playback_rate);
 
   // Carry out any actions required to seek to the given time, executing the
   // callback upon completion.
   virtual void Seek(base::TimeDelta time, const PipelineStatusCB& status_cb);
 
   // The pipeline is being stopped either as a result of an error or because
   // the client called Stop().
   virtual void Stop(const base::Closure& callback);
 
   // This method is called from the pipeline when the audio renderer
   // is disabled. Demuxers can ignore the notification if they do not
   // need to react to this event.
   //
   // TODO(acolwell): Change to generic DisableStream(DemuxerStream::Type).
   virtual void OnAudioRendererDisabled();
 
   // Returns the given stream type, or NULL if that type is not present.
-  virtual scoped_refptr<DemuxerStream> GetStream(DemuxerStream::Type type) = 0;
+  virtual DemuxerStream* GetStream(DemuxerStream::Type type) = 0;
 
   // Returns the starting time for the media file.
   virtual base::TimeDelta GetStartTime() const = 0;
 
- protected:
-  friend class base::RefCountedThreadSafe<Demuxer>;
-  virtual ~Demuxer();
-
  private:
   DISALLOW_COPY_AND_ASSIGN(Demuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DEMUXER_H_