List items should not be clickable unless they have a mouse listener attached.

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

 /*
  * Copyright (C) 2012, Google 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
@@ skipping 1975 matching lines @@
         return toElement(node);
 
     switch (roleValue()) {
     case ButtonRole:
     case PopUpButtonRole:
     case ToggleButtonRole:
     case TabRole:
     case MenuItemRole:
     case MenuItemCheckBoxRole:
     case MenuItemRadioRole:
-    case ListItemRole:
         return toElement(node);
     default:
         break;
     }
 
     Element* anchor = anchorElement();
     Element* clickElement = mouseButtonListener();
     if (!anchor || (clickElement && clickElement->isDescendantOf(anchor)))
         return clickElement;
     return anchor;
@@ skipping 834 matching lines @@
     return placeholder;
 }
 
 DEFINE_TRACE(AXNodeObject)
 {
     visitor->trace(m_node);
     AXObject::trace(visitor);
 }
 
 } // namespace blink