Replace scoped_ptr with std::unique_ptr in //media.

media/video/video_encode_accelerator.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_VIDEO_VIDEO_ENCODE_ACCELERATOR_H_
 #define MEDIA_VIDEO_VIDEO_ENCODE_ACCELERATOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 142 matching lines @@
  protected:
   // Do not delete directly; use Destroy() or own it with a scoped_ptr, which
   // will Destroy() it properly by default.
   virtual ~VideoEncodeAccelerator();
 };
 
 }  // namespace media
 
 namespace std {
 
-// Specialize std::default_delete so that scoped_ptr<VideoEncodeAccelerator>
-// uses "Destroy()" instead of trying to use the destructor.
+// Specialize std::default_delete so that
+// std::unique_ptr<VideoEncodeAccelerator> uses "Destroy()" instead of trying to
+// use the destructor.
 template <>
 struct MEDIA_EXPORT default_delete<media::VideoEncodeAccelerator> {
   void operator()(media::VideoEncodeAccelerator* vea) const;
 };
 
 }  // namespace std
 
 #endif  // MEDIA_VIDEO_VIDEO_ENCODE_ACCELERATOR_H_