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

chrome/browser/policy/managed_bookmarks_policy_handler.cc

 // Copyright 2014 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 "chrome/browser/policy/managed_bookmarks_policy_handler.h"
 
 #include <utility>
 
 #include "base/values.h"
 #include "components/bookmarks/common/bookmark_pref_names.h"
@@ skipping 31 matching lines @@
 
   prefs->SetString(bookmarks::prefs::kManagedBookmarksFolderName,
                    GetFolderName(*list));
   FilterBookmarks(list);
   prefs->SetValue(bookmarks::prefs::kManagedBookmarks, std::move(value));
 }
 
 std::string
 ManagedBookmarksPolicyHandler::GetFolderName(const base::ListValue& list) {
   // Iterate over the list, and try to find the FolderName.
-  for (auto el : list) {
+  for (const auto& el : list) {
     const base::DictionaryValue* dict = NULL;
     if (!el || !el->GetAsDictionary(&dict)) continue;
 
     std::string name;
     if (dict->GetString(ManagedBookmarksTracker::kFolderName, &name)) {
       return name;
     }
   }
 
   // FolderName not present.
@@ skipping 35 matching lines @@
         continue;
       }
       dict->SetString(ManagedBookmarksTracker::kUrl, gurl.spec());
     }
 
     ++it;
   }
 }
 
 }  // namespace policy