Implement select listbox using shadow DOM

Source/core/accessibility/AXListBox.cpp

 /*
  * Copyright (C) 2008 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
@@ skipping 66 matching lines @@
     // skip hr elements
     if (!element || isHTMLHRElement(*element))
         return 0;
 
     AXObject* listBoxObject = m_renderer->document().axObjectCache()->getOrCreate(ListBoxOptionRole);
     toAXListBoxOption(listBoxObject)->setHTMLElement(element);
 
     return listBoxObject;
 }
 
-AXObject* AXListBox::elementAccessibilityHitTest(const IntPoint& point) const
-{
-    // the internal HTMLSelectElement methods for returning a listbox option at a point
-    // ignore optgroup elements.
-    if (!m_renderer)
-        return 0;
-
-    Node* node = m_renderer->node();
-    if (!node)
-        return 0;
-
-    LayoutRect parentRect = elementRect();
-
-    AXObject* listBoxOption = 0;
-    unsigned length = m_children.size();
-    for (unsigned i = 0; i < length; i++) {
-        LayoutRect rect = toRenderListBox(m_renderer)->itemBoundingBoxRect(parentRect.location(), i);
-        // The cast to HTMLElement below is safe because the only other possible listItem type
-        // would be a WMLElement, but WML builds don't use accessibility features at all.
-        if (rect.contains(point)) {
-            listBoxOption = m_children[i].get();
-            break;
-        }
-    }
-
-    if (listBoxOption && !listBoxOption->accessibilityIsIgnored())
-        return listBoxOption;
-
-    return axObjectCache()->getOrCreate(m_renderer);
-}
-
 } // namespace WebCore