Settings Router Refactor: Replace route.subpage usage with route.path

chrome/browser/resources/settings/settings_page/main_page_behavior.js

 // Copyright 2016 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.
 
 /**
  * Calls |readyTest| repeatedly until it returns true, then calls
  * |readyCallback|.
  * @param {function():boolean} readyTest
  * @param {!Function} readyCallback
  */
@@ skipping 21 matching lines @@
   /** @override */
   attached: function() {
     if (this.domHost && this.domHost.parentNode.tagName == 'PAPER-HEADER-PANEL')
       this.scroller = this.domHost.parentNode.scroller;
     else
       this.scroller = document.body; // Used in unit tests.
   },
 
   /**
    * @param {!settings.Route} newRoute
-   * @param {!settings.Route} oldRoute
+   * @param {settings.Route} oldRoute
    */
   currentRouteChanged: function(newRoute, oldRoute) {
-    var newRouteIsSubpage = newRoute && newRoute.subpage.length;
-    var oldRouteIsSubpage = oldRoute && oldRoute.subpage.length;
+    var newRouteIsSubpage = newRoute.isSubpage();
+    var oldRouteIsSubpage = oldRoute && oldRoute.isSubpage();
 
     if (!oldRoute && newRouteIsSubpage) {
       // Allow the page to load before expanding the section. TODO(michaelpg):
       // Time this better when refactoring settings-animated-pages.
       setTimeout(function() {
         var section = this.getSection_(newRoute.section);
         if (section)
           this.expandSection_(section);
       }.bind(this));
       return;
@@ skipping 236 matching lines @@
         this.$$('[section=' + section + ']'));
   },
 };
 
 /** @polymerBehavior */
 var MainPageBehavior = [
   settings.RouteObserverBehavior,
   TransitionBehavior,
   MainPageBehaviorImpl,
 ];