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

components/dom_distiller/core/page_features.cc

Index: components/dom_distiller/core/page_features.cc
diff --git a/components/dom_distiller/core/page_features.cc b/components/dom_distiller/core/page_features.cc
index e28cf01c45090a2c8bd67eb6fab7a196fd412bcc..a222bd3f2d6bd395640fbb018a01d5b7cba39ddf 100644
--- a/components/dom_distiller/core/page_features.cc
+++ b/components/dom_distiller/core/page_features.cc
@@ -6,10 +6,10 @@
 
 #include <stddef.h>
 
+#include <memory>
 #include <string>
 
 #include "base/json/json_reader.h"
-#include "base/memory/scoped_ptr.h"
 #include "third_party/re2/src/re2/re2.h"
 #include "url/gurl.h"
 
@@ -152,7 +152,7 @@ std::vector<double> CalculateDerivedFeaturesFromJSON(
     return std::vector<double>();
   }
 
-  scoped_ptr<base::Value> json = base::JSONReader::Read(stringified);
+  std::unique_ptr<base::Value> json = base::JSONReader::Read(stringified);
   if (!json) {
     return std::vector<double>();
   }