Remove reference counting from media::Demuxer and friends.

media/filters/chunk_demuxer.h

Index: media/filters/chunk_demuxer.h
diff --git a/media/filters/chunk_demuxer.h b/media/filters/chunk_demuxer.h
index 94c952ea6e439fec4aa8c587d14705e3645045aa..a5cfc316306d6f0d94a2ff17ffaef3c2923b695c 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -45,6 +45,7 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   //   console.
   ChunkDemuxer(const base::Closure& open_cb, const NeedKeyCB& need_key_cb,
                const LogCB& log_cb);
+  virtual ~ChunkDemuxer();
 
   // Demuxer implementation.
   virtual void Initialize(DemuxerHost* host,
@@ -104,9 +105,6 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   bool EndOfStream(PipelineStatus status);
   void Shutdown();
 
- protected:
-  virtual ~ChunkDemuxer();
-
  private:
   enum State {
     WAITING_FOR_INIT,