Lots of files touched for a very simple change. Everywhere we used a const M...

media/filters/ffmpeg_demuxer.h

 // Copyright (c) 2009 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.
 
 // Implements the Demuxer interface using FFmpeg's libavformat.  At this time
 // will support demuxing any audio/video format thrown at it.  The streams
 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer
 // key FFmpegCodecID which contains the CodecID enumeration value.  The CodecIDs
 // can be used to create and initialize the corresponding FFmpeg decoder.
 //
@@ skipping 39 matching lines @@
   // Returns true is this stream has pending reads, false otherwise.
   bool HasPendingReads();
 
   // Enqueues and takes ownership over the given AVPacket.
   void EnqueuePacket(AVPacket* packet);
 
   // Returns the duration of this stream.
   base::TimeDelta duration() { return duration_; }
 
   // DemuxerStream implementation.
-  virtual const MediaFormat* GetMediaFormat();
+  virtual const MediaFormat& media_format();
   virtual void Read(Assignable<Buffer>* buffer);
 
   AVStream* av_stream() {
     return av_stream_;
   }
 
   static const char* interface_id();
 
  protected:
   virtual void* QueryInterface(const char* interface_id);
@@ skipping 57 matching lines @@
   // Vector of streams.
   typedef std::vector< scoped_refptr<FFmpegDemuxerStream> > StreamVector;
   StreamVector streams_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_DEMUXER_H_