Revert the merge. Mac build is mysteriously broken.

third_party/WebKit/WebCore/page/AccessibilityRenderObject.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 535 matching lines @@
     if (!elt)
         elt = mouseButtonListener();
     return elt;
 }
 
 Element* AccessibilityRenderObject::mouseButtonListener() const
 {
     Node* node = m_renderer->element();
     if (!node)
         return 0;
-    if (!node->isElementNode())
-        return 0;
-
+    if (!node->isEventTargetNode())
+        return 0;
+    
     // FIXME: Do the continuation search like anchorElement does
-    for (Element* element = static_cast<Element*>(node); element; element = element->parentElement()) {
-        if (element->inlineEventListenerForType(eventNames().clickEvent) || element->inlineEventListenerForType(eventNames().mousedownEvent) || element->inlineEventListenerForType(eventNames().mouseupEvent))
-            return element;
-    }
-
+    for (EventTargetNode* elt = static_cast<EventTargetNode*>(node); elt; elt = static_cast<EventTargetNode*>(elt->parentNode())) {
+        if (elt->inlineEventListenerForType(eventNames().clickEvent) || elt->inlineEventListenerForType(eventNames().mousedownEvent) || elt->inlineEventListenerForType(eventNames().mouseupEvent))
+            return static_cast<Element*>(elt);
+    }
+    
     return 0;
 }
 
 static Element* siblingWithAriaRole(String role, Node* node)
 {
     Node* sibling = node->parent()->firstChild();
     while (sibling) {
         if (sibling->isElementNode()) {
             String siblingAriaRole = static_cast<Element*>(sibling)->getAttribute(roleAttr).string();
             if (equalIgnoringCase(siblingAriaRole, role))
@@ skipping 1883 matching lines @@
 }
      
 void AccessibilityRenderObject::updateBackingStore()
 {
     if (!m_renderer)
         return;
     m_renderer->view()->layoutIfNeeded();
 }    
     
 } // namespace WebCore