MD History: Replace app-route with a custom router

chrome/browser/resources/md_history/side_bar.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.
 
 Polymer({
   is: 'history-side-bar',
 
   behaviors: [Polymer.IronA11yKeysBehavior],
 
   properties: {
     selectedPage: {type: String, notify: true},
 
-    route: Object,
-
     showFooter: Boolean,
 
     // If true, the sidebar is contained within an app-drawer.
     drawer: {type: Boolean, reflectToAttribute: true},
   },
 
   keyBindings: {
     'space:keydown': 'onSpacePressed_',
   },
 
@@ skipping 17 matching lines @@
    */
   onClearBrowsingDataTap_: function(e) {
     var browserService = md_history.BrowserService.getInstance();
     browserService.recordAction('InitClearBrowsingData');
     browserService.openClearBrowsingData();
     /** @type {PaperRippleElement} */(this.$['cbd-ripple']).upAction();
     e.preventDefault();
   },
 
   /**
-   * @param {Object} route
+   * Prevent clicks on sidebar items from navigating. These are only links for
+   * accessibility purposes, taps are handled separately by <iron-selector>.
    * @private
    */
-  getQueryString_: function(route) { return window.location.search; }
+  onItemClick_: function(e) {
+    e.preventDefault();
+  },
 });