Accessibility: chrome://history keyboarding issues.

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 213 matching lines @@
 
     // Support clicking anywhere inside the entry box.
     entryBox.addEventListener('click', function(e) {
       e.currentTarget.querySelector('a').click();
     });
   } else {
     var dropDown = createElementWithClassName('button', 'drop-down');
     dropDown.value = 'Open action menu';
     dropDown.title = loadTimeData.getString('actionMenuDescription');
     dropDown.setAttribute('menu', '#action-menu');
+    dropDown.setAttribute('aria-haspopup', 'true');
     cr.ui.decorate(dropDown, MenuButton);
 
     dropDown.addEventListener('mousedown', setActiveVisit);
     dropDown.addEventListener('focus', setActiveVisit);
 
     // Prevent clicks on the drop down from affecting the checkbox.
     dropDown.addEventListener('click', function(e) { e.preventDefault(); });
     entryBox.appendChild(dropDown);
   }
 
@@ skipping 1770 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;
 });