Implement select listbox using shadow DOM

Source/core/accessibility/AXListBox.cpp

Index: Source/core/accessibility/AXListBox.cpp
diff --git a/Source/core/accessibility/AXListBox.cpp b/Source/core/accessibility/AXListBox.cpp
index 432302b6c8c5f40d578fad7690b343ce762e8c1a..369283a644fe999e39a2cb0857492d63515dd7b5 100644
--- a/Source/core/accessibility/AXListBox.cpp
+++ b/Source/core/accessibility/AXListBox.cpp
@@ -84,35 +84,4 @@ AXObject* AXListBox::listBoxOptionAXObject(HTMLElement* element) const
     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