Cleanup <static_cast>: Switch to toFoo for Accessibility Objects.

Source/core/accessibility/AccessibilityListBox.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 76 matching lines @@
     if (!canSetSelectedChildrenAttribute())
         return;
 
     Node* selectNode = m_renderer->node();
     if (!selectNode)
         return;
 
     // disable any selected options
     unsigned length = m_children.size();
     for (unsigned i = 0; i < length; i++) {
-        AccessibilityListBoxOption* listBoxOption = static_cast<AccessibilityListBoxOption*>(m_children[i].get());
+        AccessibilityListBoxOption* listBoxOption = toAccessibilityListBoxOption(m_children[i].get());
         if (listBoxOption->isSelected())
             listBoxOption->setSelected(false);
     }
 
     length = children.size();
     for (unsigned i = 0; i < length; i++) {
         AccessibilityObject* obj = children[i].get();
         if (obj->roleValue() != ListBoxOptionRole)
             continue;
 
-        static_cast<AccessibilityListBoxOption*>(obj)->setSelected(true);
+        toAccessibilityListBoxOption(obj)->setSelected(true);
     }
 }
 
 void AccessibilityListBox::selectedChildren(AccessibilityChildrenVector& result)
 {
     ASSERT(result.isEmpty());
 
     if (!hasChildren())
         addChildren();
 
     unsigned length = m_children.size();
     for (unsigned i = 0; i < length; i++) {
-        if (static_cast<AccessibilityListBoxOption*>(m_children[i].get())->isSelected())
+        if (toAccessibilityListBoxOption(m_children[i].get())->isSelected())
             result.append(m_children[i]);
     }
 }
 
 AccessibilityObject* AccessibilityListBox::listBoxOptionAccessibilityObject(HTMLElement* element) const
 {
     // skip hr elements
     if (!element || element->hasTagName(hrTag))
         return 0;
 
     AccessibilityObject* listBoxObject = m_renderer->document().axObjectCache()->getOrCreate(ListBoxOptionRole);
-    static_cast<AccessibilityListBoxOption*>(listBoxObject)->setHTMLElement(element);
+    toAccessibilityListBoxOption(listBoxObject)->setHTMLElement(element);
 
     return listBoxObject;
 }
 
 AccessibilityObject* AccessibilityListBox::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;
@@ skipping 16 matching lines @@
         }
     }
 
     if (listBoxOption && !listBoxOption->accessibilityIsIgnored())
         return listBoxOption;
 
     return axObjectCache()->getOrCreate(m_renderer);
 }
 
 } // namespace WebCore