Settings Router Refactor: Kill settings-router.

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.
 
 // Fast out, slow in.
 var EASING_FUNCTION = 'cubic-bezier(0.4, 0, 0.2, 1)';
 var EXPAND_DURATION = 350;
 
 /**
  * Calls |readyTest| repeatedly until it returns true, then calls
@@ skipping 335 matching lines @@
   TransitionBehavior,
   MainPageBehaviorImpl
 ];
 
 
 /**
  * TODO(michaelpg): integrate slide animations.
  * @polymerBehavior RoutableBehavior
  */
 var RoutableBehaviorImpl = {
-  properties: {
-    /** Contains the current route. */
-    currentRoute: {
-      type: Object,
-      notify: true,
-      observer: 'currentRouteChanged_',
-    },
-  },
-
   /** @private */
   scrollToSection_: function() {
     doWhenReady(
         function() {
           return this.scrollHeight > 0;
         }.bind(this),
         function() {
           // If the current section changes while we are waiting for the page to
           // be ready, scroll to the newest requested section.
-          this.getSection_(this.currentRoute.section).scrollIntoView();
+          this.getSection_(settings.getCurrentRoute().section).scrollIntoView();
         }.bind(this));
   },
 
   /** @private */
-  currentRouteChanged_: function(newRoute, oldRoute) {
+  currentRouteChanged: function(newRoute, oldRoute) {
     var newRouteIsSubpage = newRoute && newRoute.subpage.length;
     var oldRouteIsSubpage = oldRoute && oldRoute.subpage.length;
 
     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);
@@ skipping 29 matching lines @@
   getSection_: function(section) {
     return /** @type {?SettingsSectionElement} */(
         this.$$('[section=' + section + ']'));
   },
 };
 
 
 /** @polymerBehavior */
 var RoutableBehavior = [
   MainPageBehavior,
+  settings.RouteObserverBehavior,
   RoutableBehaviorImpl
 ];