AXObject::performDefaultAction() should focus if it can't click

third_party/WebKit/Source/modules/accessibility/AXMenuList.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 30 matching lines @@
   return new AXMenuList(layoutObject, axObjectCache);
 }
 
 AccessibilityRole AXMenuList::determineAccessibilityRole() {
   if ((m_ariaRole = determineAriaRoleAttribute()) != UnknownRole)
     return m_ariaRole;
 
   return PopUpButtonRole;
 }
 
-bool AXMenuList::press() const {
+bool AXMenuList::press() {
   if (!m_layoutObject)
     return false;
 
   HTMLSelectElement* select = toLayoutMenuList(m_layoutObject)->selectElement();
   if (select->popupIsVisible())
     select->hidePopup();
   else
     select->showPopup();
   return true;
 }
@@ skipping 88 matching lines @@
 
   AXMenuListPopup* popup = toAXMenuListPopup(children()[0].get());
   popup->didHide();
 
   if (getNode() && getNode()->isFocused())
     axObjectCache().postNotification(
         this, AXObjectCacheImpl::AXFocusedUIElementChanged);
 }
 
 }  // namespace blink