MD History: Replace app-route with a custom router

chrome/browser/resources/md_history/side_bar.js

Index: chrome/browser/resources/md_history/side_bar.js
diff --git a/chrome/browser/resources/md_history/side_bar.js b/chrome/browser/resources/md_history/side_bar.js
index de2a3eee1419bbef7d13fa70bfb64636bf608cd8..a0a82aee324c0fb8280ad8daaa6dba28f291b7ae 100644
--- a/chrome/browser/resources/md_history/side_bar.js
+++ b/chrome/browser/resources/md_history/side_bar.js
@@ -10,8 +10,6 @@ Polymer({
   properties: {
     selectedPage: {type: String, notify: true},
 
-    route: Object,
-
     showFooter: Boolean,
 
     // If true, the sidebar is contained within an app-drawer.
@@ -49,8 +47,11 @@ Polymer({
   },
 
   /**
-   * @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();
+  },
 });