Delete now deprecated BufferedDataSource and friends.

media/blink/active_loader.h

 // Copyright 2013 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_BLINK_ACTIVE_LOADER_H_
 #define MEDIA_BLINK_ACTIVE_LOADER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 13 matching lines @@
   // Creates an ActiveLoader with the given loader. It is assumed that the
   // initial state of |loader| is loading and not deferred.
   explicit ActiveLoader(std::unique_ptr<blink::WebURLLoader> loader);
   ~ActiveLoader();
 
   // Starts or stops deferring the resource load.
   void SetDeferred(bool deferred);
   bool deferred() { return deferred_; }
 
  private:
-  friend class BufferedDataSourceTest;
   friend class MultibufferDataSourceTest;
 
   std::unique_ptr<blink::WebURLLoader> loader_;
   bool deferred_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ActiveLoader);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_ACTIVE_LOADER_H_