MD Settings: remove unsupported routes from guest-mode.

chrome/browser/resources/settings/a11y_page/a11y_page.js

Index: chrome/browser/resources/settings/a11y_page/a11y_page.js
diff --git a/chrome/browser/resources/settings/a11y_page/a11y_page.js b/chrome/browser/resources/settings/a11y_page/a11y_page.js
index 99ecf4da04d8547cea5b7039c93ec6cb2e07aca4..add54039ddbd5f5152acc5ce6152009a0d51738d 100644
--- a/chrome/browser/resources/settings/a11y_page/a11y_page.js
+++ b/chrome/browser/resources/settings/a11y_page/a11y_page.js
@@ -34,9 +34,11 @@ Polymer({
       value: function() {
         var map = new Map();
         // <if expr="chromeos">
-        map.set(
-            settings.Route.MANAGE_ACCESSIBILITY.path,
-            '#subpage-trigger .subpage-arrow');
+        if (settings.routes.MANAGE_ACCESSIBILITY) {
+          map.set(
+              settings.routes.MANAGE_ACCESSIBILITY.path,
+              '#subpage-trigger .subpage-arrow');
+        }
         // </if>
         return map;
       },
@@ -46,7 +48,7 @@ Polymer({
   // <if expr="chromeos">
   /** @private */
   onManageAccessibilityFeaturesTap_: function() {
-    settings.navigateTo(settings.Route.MANAGE_ACCESSIBILITY);
+    settings.navigateTo(settings.routes.MANAGE_ACCESSIBILITY);
   },
   // </if>
 });