Move DataSource::SetPreload() to BufferedDataSource.

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/memory/ref_counted.h"
 #include "media/base/media_export.h"
-#include "media/base/preload.h"
 
 namespace media {
 
 class MEDIA_EXPORT DataSourceHost {
  public:
   virtual ~DataSourceHost();
 
   // Set the total size of the media file.
   virtual void SetTotalBytes(int64 total_bytes) = 0;
 
@@ skipping 32 matching lines @@
   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;
 
-  // Alert the DataSource that the video preload value has been changed.
-  virtual void SetPreload(Preload preload) = 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:
   // Only allow scoped_refptr<> to delete DataSource.
   friend class base::RefCountedThreadSafe<DataSource>;
   virtual ~DataSource();
 
   DataSourceHost* host();
 
  private:
   DataSourceHost* host_;
 
   DISALLOW_COPY_AND_ASSIGN(DataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DATA_SOURCE_H_