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

media/base/media_file_checker.cc

Index: media/base/media_file_checker.cc
diff --git a/media/base/media_file_checker.cc b/media/base/media_file_checker.cc
index a04775b76b6a3bf68bf116bde4c58105a81b2f53..ab5ada0edd5a19db7073d2377a5151c6b5fc1d48 100644
--- a/media/base/media_file_checker.cc
+++ b/media/base/media_file_checker.cc
@@ -7,6 +7,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <map>
+#include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ -58,7 +59,7 @@ bool MediaFileChecker::Start(base::TimeDelta check_time) {
     return false;
 
   AVPacket packet;
-  scoped_ptr<AVFrame, media::ScopedPtrAVFreeFrame> frame(av_frame_alloc());
+  std::unique_ptr<AVFrame, media::ScopedPtrAVFreeFrame> frame(av_frame_alloc());
   int result = 0;
 
   const base::TimeTicks deadline = base::TimeTicks::Now() +