Adding ChunkDemuxer implementation.

media/filters/audio_file_reader.h

Index: media/filters/audio_file_reader.h
diff --git a/media/filters/audio_file_reader.h b/media/filters/audio_file_reader.h
index ae929b60548ead48f6b9cb8af28a7cde25dc5649..470caa36838b5762c2246abb2b3ab40893ddd6d2 100644
--- a/media/filters/audio_file_reader.h
+++ b/media/filters/audio_file_reader.h
@@ -54,26 +54,6 @@ class AudioFileReader {
   DISALLOW_COPY_AND_ASSIGN(AudioFileReader);
 };
 
-class InMemoryDataReader : public FFmpegURLProtocol {
- public:
-  // Ownership of |data| is not taken, instead it simply maintains
-  // a weak reference.
-  InMemoryDataReader(const char* data, int64 size);
-
-  virtual int Read(int size, uint8* data);
-  virtual bool GetPosition(int64* position_out);
-  virtual bool SetPosition(int64 position);
-  virtual bool GetSize(int64* size_out);
-  virtual bool IsStreaming();
-
- private:
-  const char* data_;
-  int64 size_;
-  int64 position_;
-
-  DISALLOW_COPY_AND_ASSIGN(InMemoryDataReader);
-};
-
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_AUDIO_FILE_READER_H_