RefCounted types should not have public destructors, media/ and gpu/ edition

media/base/filters.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.
 
 // Filters are connected in a strongly typed manner, with downstream filters
 // always reading data from upstream filters.  Upstream filters have no clue
 // who is actually reading from them, and return the results via callbacks.
 //
 //                         DemuxerStream(Video) <- VideoDecoder <- VideoRenderer
 // DataSource <- Demuxer <
@@ skipping 103 matching lines @@
   // Initialize a VideoRenderer with the given VideoDecoder, executing the
   // callback upon completion.
   virtual void Initialize(const scoped_refptr<VideoDecoder>& decoder,
                           const PipelineStatusCB& status_cb,
                           const StatisticsCB& statistics_cb,
                           const TimeCB& time_cb) = 0;
 
   // Returns true if this filter has received and processed an end-of-stream
   // buffer.
   virtual bool HasEnded() = 0;
+
+ protected:
+  virtual ~VideoRenderer() {}
 };
 
 class MEDIA_EXPORT AudioRenderer : public Filter {
  public:
   // Used to update the pipeline's clock time. The first parameter is the
   // current time, and the second parameter is the time that the clock must not
   // exceed.
   typedef base::Callback<void(base::TimeDelta, base::TimeDelta)> TimeCB;
 
   // Initialize a AudioRenderer with the given AudioDecoder, executing the
@@ skipping 11 matching lines @@
   // buffer.
   virtual bool HasEnded() = 0;
 
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;
 
   // Resumes playback after underflow occurs.
   // |buffer_more_audio| is set to true if you want to increase the size of the
   // decoded audio buffer.
   virtual void ResumeAfterUnderflow(bool buffer_more_audio) = 0;
+
+ protected:
+  virtual ~AudioRenderer() {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTERS_H_