MD Settings: remove unsupported routes from guest-mode.

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

Index: chrome/browser/resources/settings/site_settings/site_data.js
diff --git a/chrome/browser/resources/settings/site_settings/site_data.js b/chrome/browser/resources/settings/site_settings/site_data.js
index 690eaabab6c0c9de3cf1c915cc0ea73857813c46..0d0b1a760a439d4fbbb21907cd70672ea8f72f3c 100644
--- a/chrome/browser/resources/settings/site_settings/site_data.js
+++ b/chrome/browser/resources/settings/site_settings/site_data.js
@@ -55,9 +55,11 @@ Polymer({
     // Populate the |focusConfig| map of the parent <settings-animated-pages>
     // element, with additional entries that correspond to subpage trigger
     // elements residing in this element's Shadow DOM.
-    this.focusConfig.set(
-        settings.Route.SITE_SETTINGS_DATA_DETAILS.path,
-        '* /deep/ #filter /deep/ #searchInput');
+    if (settings.routes.SITE_SETTINGS_DATA_DETAILS) {
+      this.focusConfig.set(
+          settings.routes.SITE_SETTINGS_DATA_DETAILS.path,
+          '* /deep/ #filter /deep/ #searchInput');
+    }
   },
 
   /** @override */
@@ -160,7 +162,7 @@ Polymer({
    */
   onSiteTap_: function(event) {
     settings.navigateTo(
-        settings.Route.SITE_SETTINGS_DATA_DETAILS,
+        settings.routes.SITE_SETTINGS_DATA_DETAILS,
         new URLSearchParams('site=' + event.model.item.site));
   },
 });