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

media/video/video_decode_accelerator.h

Index: media/video/video_decode_accelerator.h
diff --git a/media/video/video_decode_accelerator.h b/media/video/video_decode_accelerator.h
index 59702f14d8befe4e7ebc83c4c92282c7a7b70f91..a00c9514d59f42de11dfc4a7b510ebf3c0739574 100644
--- a/media/video/video_decode_accelerator.h
+++ b/media/video/video_decode_accelerator.h
@@ -335,8 +335,9 @@ class MEDIA_EXPORT VideoDecodeAccelerator {
 
 namespace std {
 
-// Specialize std::default_delete so that scoped_ptr<VideoDecodeAccelerator>
-// uses "Destroy()" instead of trying to use the destructor.
+// Specialize std::default_delete so that
+// std::unique_ptr<VideoDecodeAccelerator> uses "Destroy()" instead of trying to
+// use the destructor.
 template <>
 struct MEDIA_EXPORT default_delete<media::VideoDecodeAccelerator> {
   void operator()(media::VideoDecodeAccelerator* vda) const;