Remove MediaFormat once and for all.

media/base/filters.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.
 
 // 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 14 matching lines @@
 
 #include <limits>
 #include <string>
 
 #include "base/callback.h"
 #include "base/callback_old.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "media/base/audio_decoder_config.h"
-#include "media/base/media_format.h"
 #include "media/base/pipeline_status.h"
 #include "media/base/video_frame.h"
 
 struct AVStream;
 
 namespace media {
 
 class Buffer;
 class Decoder;
 class DemuxerStream;
@@ skipping 124 matching lines @@
   // Schedules a read.  When the |read_callback| is called, the downstream
   // filter takes ownership of the buffer by AddRef()'ing the buffer.
   virtual void Read(const ReadCallback& read_callback) = 0;
 
   // Returns an |AVStream*| if supported, or NULL.
   virtual AVStream* GetAVStream();
 
   // Returns the type of stream.
   virtual Type type() = 0;
 
-  // Returns the media format of this stream.
-  virtual const MediaFormat& media_format() = 0;
-
   virtual void EnableBitstreamConverter() = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<DemuxerStream>;
   virtual ~DemuxerStream();
 };
 
 class Demuxer : public Filter {
  public:
   // Returns the given stream type, or NULL if that type is not present.
@@ skipping 117 matching lines @@
   // buffer.
   virtual bool HasEnded() = 0;
 
   // Sets the output volume.
   virtual void SetVolume(float volume) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FILTERS_H_