Convert //components/bookmarks from scoped_ptr to std::unique_ptr

components/bookmarks/browser/bookmark_codec.cc

Index: components/bookmarks/browser/bookmark_codec.cc
diff --git a/components/bookmarks/browser/bookmark_codec.cc b/components/bookmarks/browser/bookmark_codec.cc
index ddda44b7fd3c7230522581aa700f40ace0f2ef07..8bda69bf3880cb03ead4cad1450535c27cb1a437 100644
--- a/components/bookmarks/browser/bookmark_codec.cc
+++ b/components/bookmarks/browser/bookmark_codec.cc
@@ -382,7 +382,7 @@ bool BookmarkCodec::DecodeMetaInfo(const base::DictionaryValue& value,
   if (!value.Get(kMetaInfo, &meta_info))
     return true;
 
-  scoped_ptr<base::Value> deserialized_holder;
+  std::unique_ptr<base::Value> deserialized_holder;
 
   // Meta info used to be stored as a serialized dictionary, so attempt to
   // parse the value as one.