Convert //media/filters from scoped_ptr to std::unique_ptr

media/filters/vp9_raw_bits_reader.h

Index: media/filters/vp9_raw_bits_reader.h
diff --git a/media/filters/vp9_raw_bits_reader.h b/media/filters/vp9_raw_bits_reader.h
index 5cc46e25a9749c38f8fc48a9995cc3e8da387e9f..80c41b9b72d514b74c63089a31d5f56a6d9dbbdf 100644
--- a/media/filters/vp9_raw_bits_reader.h
+++ b/media/filters/vp9_raw_bits_reader.h
@@ -8,8 +8,9 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 
 namespace media {
@@ -48,7 +49,7 @@ class MEDIA_EXPORT Vp9RawBitsReader {
   int ReadSignedLiteral(int bits);
 
  private:
-  scoped_ptr<BitReader> reader_;
+  std::unique_ptr<BitReader> reader_;
 
   // Indicates if none of the reads since the last Initialize() call has gone
   // beyond the end of available data.