Extend scoped_ptr to be closer to unique_ptr. Support custom deleters, and deleting arrays.

media/base/serial_runner.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_SERIAL_RUNNER_H_
 #define MEDIA_BASE_SERIAL_RUNNER_H_
 
 #include <queue>
 
 #include "base/callback.h"
@@ skipping 38 matching lines @@
   //
   // All bound functions are executed on the thread that Run() is called on,
   // including |done_cb|.
   //
   // Deleting the object will prevent execution of any unstarted bound
   // functions, including |done_cb|.
   static scoped_ptr<SerialRunner> Run(
       const Queue& bound_fns, const PipelineStatusCB& done_cb);
 
  private:
-  friend class scoped_ptr<SerialRunner>;
+  friend struct base::DefaultDeleter<SerialRunner>;
 
   SerialRunner(const Queue& bound_fns, const PipelineStatusCB& done_cb);
   ~SerialRunner();
 
   void RunNextInSeries(PipelineStatus last_status);
 
   base::WeakPtrFactory<SerialRunner> weak_this_;
   scoped_refptr<base::MessageLoopProxy> message_loop_;
   Queue bound_fns_;
   PipelineStatusCB done_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(SerialRunner);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_SERIAL_RUNNER_H_