Settings Router Refactor: Kill settings-router.

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

-// Copyright 2015 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.
-
-/**
- * @fileoverview
- * 'settings-router' is only used to propagate route changes to bound elements.
- * All the real routing is defined within route.js.
- * TODO(tommycli): Remove once all elements migrated to RouteObserverBehavior.
- *
- * Example:
- *    <settings-router current-route="{{currentRoute}}">
- *    </settings-router>
- */
-Polymer({
-  is: 'settings-router',
-
-  behaviors: [settings.RouteObserverBehavior],
-
-  properties: {
-    /**
-     * Only used to propagate settings.currentRoute to all the elements bound to
-     * settings-router.
-     * @type {!settings.Route}
-     */
-    currentRoute: {
-      notify: true,
-      type: Object,
-      value: function() { return settings.getCurrentRoute(); },
-    },
-  },
-
-  /** @protected */
-  currentRouteChanged: function() {
-    this.currentRoute = settings.getCurrentRoute();
-  },
-});