Fix chrome://history on Android (check whether element is present first).

chrome/browser/resources/history/history.js

 // Copyright (c) 2012 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.
 
 <include src="../uber/uber_utils.js">
 <include src="history_focus_manager.js">
 
 ///////////////////////////////////////////////////////////////////////////////
 // Globals:
 /** @const */ var RESULTS_PER_PAGE = 150;
@@ skipping 978 matching lines @@
 };
 
 // HistoryView, private: ------------------------------------------------------
 
 /**
  * Clear the results in the view.  Since we add results piecemeal, we need
  * to clear them out when we switch to a new page or reload.
  * @private
  */
 HistoryView.prototype.clear_ = function() {
-  if ($('alertOverlay').classList.contains('showing'))
+  var alertOverlay = $('alertOverlay');
+  if (alertOverlay && alertOverlay.classList.contains('showing'))
     hideConfirmationOverlay();
 
   this.resultDiv_.textContent = '';
 
   this.currentVisits_.forEach(function(visit) {
     visit.isRendered = false;
   });
   this.currentVisits_ = [];
 
   document.body.classList.remove('has-results');
@@ skipping 1013 matching lines @@
     historyView.reload();
 }
 
 // Add handlers to HTML elements.
 document.addEventListener('DOMContentLoaded', load);
 
 // This event lets us enable and disable menu items before the menu is shown.
 document.addEventListener('canExecute', function(e) {
   e.canExecute = true;
 });