Remove raw base::DictionaryValue::SetWithoutPathExpansion in //chrome

chrome/browser/supervised_user/supervised_user_bookmarks_handler.cc

Index: chrome/browser/supervised_user/supervised_user_bookmarks_handler.cc
diff --git a/chrome/browser/supervised_user/supervised_user_bookmarks_handler.cc b/chrome/browser/supervised_user/supervised_user_bookmarks_handler.cc
index 27440de5cd5c564dc78fdd499c67a5eda0d50de3..ed6616737ddee44c830dbad1bb18079b5cd661f6 100644
--- a/chrome/browser/supervised_user/supervised_user_bookmarks_handler.cc
+++ b/chrome/browser/supervised_user/supervised_user_bookmarks_handler.cc
@@ -8,6 +8,7 @@
 #include <utility>
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "components/url_formatter/url_fixer.h"
@@ -172,7 +173,8 @@ void SupervisedUserBookmarksHandler::AddFoldersToTree() {
       std::unique_ptr<base::DictionaryValue> node(new base::DictionaryValue);
       node->SetIntegerWithoutPathExpansion(kId, folder.id);
       node->SetStringWithoutPathExpansion(kName, folder.name);
-      node->SetWithoutPathExpansion(kChildren, new base::ListValue);
+      node->SetWithoutPathExpansion(kChildren,
+                                    base::MakeUnique<base::ListValue>());
       if (!AddNodeToTree(folder.parent_id, std::move(node)))
         folders_failed.push_back(folder);
     }