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

components/user_prefs/tracked/pref_hash_calculator.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/user_prefs/tracked/pref_hash_calculator.h"
 
 #include <stdint.h>
 
+#include <memory>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 #include "crypto/hmac.h"
 
 namespace {
 
 // Calculates an HMAC of |message| using |key|, encoded as a hexadecimal string.
 std::string GetDigestString(const std::string& key,
                             const std::string& message) {
@@ skipping 19 matching lines @@
                                        digest.size()));
 }
 
 // Renders |value| as a string. |value| may be NULL, in which case the result
 // is an empty string. This method can be expensive and its result should be
 // re-used rather than recomputed where possible.
 std::string ValueAsString(const base::Value* value) {
   // Dictionary values may contain empty lists and sub-dictionaries. Make a
   // deep copy with those removed to make the hash more stable.
   const base::DictionaryValue* dict_value;
-  scoped_ptr<base::DictionaryValue> canonical_dict_value;
+  std::unique_ptr<base::DictionaryValue> canonical_dict_value;
   if (value && value->GetAsDictionary(&dict_value)) {
     canonical_dict_value = dict_value->DeepCopyWithoutEmptyChildren();
     value = canonical_dict_value.get();
   }
 
   std::string value_as_string;
   if (value) {
     JSONStringValueSerializer serializer(&value_as_string);
     serializer.Serialize(*value);
   }
@@ skipping 54 matching lines @@
                          digest_string)) {
     return VALID;
   }
   if (VerifyDigestString(seed_,
                          GetMessage(legacy_device_id_, path, value_as_string),
                          digest_string)) {
     return VALID_SECURE_LEGACY;
   }
   return INVALID;
 }