Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

extensions/common/extension_api.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 "extensions/common/extension_api.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 114 matching lines @@
     schema->SetString(key, schema_namespace + "." + old_id);
 }
 
 // Modify all "$ref" keys anywhere in |schema| to be prefxied by
 // |schema_namespace| if they do not already specify a namespace.
 void PrefixRefsWithNamespace(const std::string& schema_namespace,
                              base::Value* value) {
   base::ListValue* list = NULL;
   base::DictionaryValue* dict = NULL;
   if (value->GetAsList(&list)) {
-    for (base::ListValue::iterator i = list->begin(); i != list->end(); ++i) {
-      PrefixRefsWithNamespace(schema_namespace, *i);
+    for (const auto& i : *list) {
+      PrefixRefsWithNamespace(schema_namespace, i.get());
     }
   } else if (value->GetAsDictionary(&dict)) {
     MaybePrefixFieldWithNamespace(schema_namespace, dict, "$ref");
     for (base::DictionaryValue::Iterator i(*dict); !i.IsAtEnd(); i.Advance()) {
       base::Value* value = NULL;
       CHECK(dict->GetWithoutPathExpansion(i.key(), &value));
       PrefixRefsWithNamespace(schema_namespace, value);
     }
   }
 }
@@ skipping 241 matching lines @@
       break;
 
     api_name_candidate = api_name_candidate.substr(0, last_dot_index);
   }
 
   *child_name = "";
   return std::string();
 }
 
 }  // namespace extensions