[MD settings] collapse cookie details in subpage

chrome/browser/resources/settings/site_settings/cookie_tree_node.js

Index: chrome/browser/resources/settings/site_settings/cookie_tree_node.js
diff --git a/chrome/browser/resources/settings/site_settings/cookie_tree_node.js b/chrome/browser/resources/settings/site_settings/cookie_tree_node.js
index 8dd3b42674942d4ded6c4c1fb56e4b9c8fe337d0..f6c1cbc5d98c54cff5a7558e54d8d587c377b47b 100644
--- a/chrome/browser/resources/settings/site_settings/cookie_tree_node.js
+++ b/chrome/browser/resources/settings/site_settings/cookie_tree_node.js
@@ -134,9 +134,8 @@ cr.define('settings', function() {
      */
     getCookieList: function() {
       var list = [];
-
-      for (var group of this.children_) {
-        for (var cookie of group.children_) {
+      for (var child of this.children_) {
+        for (var cookie of child.children_) {
           list.push({title: cookie.data.title,
                      id: cookie.data.id,
                      data: cookie.data});