Separate DemuxerHost from DataSourceHost.

media/base/data_source.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.
 
 #ifndef MEDIA_BASE_DATA_SOURCE_H_
 #define MEDIA_BASE_DATA_SOURCE_H_
 
 #include "base/callback.h"
 #include "base/time/time.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
+// TODO(sandersd): Rename to BufferedDataSourceHost.

[scherkus (not reviewing), 2014/03/28 20:54:09]

nit: ... and move to content/renderer/media/

[sandersd (OOO until July 31), 2014/03/28 21:14:28]

Done.

 class MEDIA_EXPORT DataSourceHost {
  public:
   // Set the total size of the media file.
   virtual void SetTotalBytes(int64 total_bytes) = 0;
 
   // Notify the host that byte range [start,end] has been buffered.
   // TODO(fischman): remove this method when demuxing is push-based instead of
   // pull-based.  http://crbug.com/131444
   virtual void AddBufferedByteRange(int64 start, int64 end) = 0;
 
-  // Notify the host that time range [start,end] has been buffered.
-  virtual void AddBufferedTimeRange(base::TimeDelta start,
-                                    base::TimeDelta end) = 0;
-
  protected:
   virtual ~DataSourceHost();
 };
 
 class MEDIA_EXPORT DataSource {
  public:
   typedef base::Callback<void(int64, int64)> StatusCallback;
   typedef base::Callback<void(int)> ReadCB;
   static const int kReadError;
 
   DataSource();
   virtual ~DataSource();
 
-  virtual void set_host(DataSourceHost* host);
-
   // Reads |size| bytes from |position| into |data|. And when the read is done
   // or failed, |read_cb| is called with the number of bytes read or
   // kReadError in case of error.
   virtual void Read(int64 position, int size, uint8* data,
                     const DataSource::ReadCB& read_cb) = 0;
 
   // Stops the DataSource. Once this is called all future Read() calls will
   // return an error.
   virtual void Stop(const base::Closure& callback) = 0;
 
   // Returns true and the file size, false if the file size could not be
   // retrieved.
   virtual bool GetSize(int64* size_out) = 0;
 
   // Returns true if we are performing streaming. In this case seeking is
   // not possible.
   virtual bool IsStreaming() = 0;
 
   // Notify the DataSource of the bitrate of the media.
   // Values of |bitrate| <= 0 are invalid and should be ignored.
   virtual void SetBitrate(int bitrate) = 0;
 
- protected:
-  DataSourceHost* host();
-
  private:
-  DataSourceHost* host_;
-
   DISALLOW_COPY_AND_ASSIGN(DataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DATA_SOURCE_H_