[oilpan] Completely move HTMLFormControlElement's hierarchy to the managed heap

Source/core/accessibility/AccessibilityListBoxOption.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 67 matching lines @@
         return false;
 
     if (!m_optionElement->hasTagName(optionTag))
         return false;
     
     return static_cast<HTMLOptionElement*>(m_optionElement)->selected();
 }
 
 bool AccessibilityListBoxOption::isSelectedOptionActive() const
 {
-    HTMLSelectElement* listBoxParentNode = listBoxOptionParentNode();
+    Handle<HTMLSelectElement> listBoxParentNode = listBoxOptionParentNode();
     if (!listBoxParentNode)
         return false;
 
     return listBoxParentNode->activeSelectionEndListIndex() == listBoxOptionIndex();
 }
 
 LayoutRect AccessibilityListBoxOption::elementRect() const
 {
     LayoutRect rect;
     if (!m_optionElement)
         return rect;
     
-    HTMLSelectElement* listBoxParentNode = listBoxOptionParentNode();
+    Handle<HTMLSelectElement> listBoxParentNode = listBoxOptionParentNode();
     if (!listBoxParentNode)
         return rect;
     
     RenderObject* listBoxRenderer = listBoxParentNode->renderer();
     if (!listBoxRenderer)
         return rect;
     
     LayoutRect parentRect = listBoxRenderer->document()->axObjectCache()->getOrCreate(listBoxRenderer)->boundingBoxRect();
     int index = listBoxOptionIndex();
     if (index != -1)
@@ skipping 17 matching lines @@
 {
     if (!m_optionElement)
         return false;
     
     if (!m_optionElement->hasTagName(optionTag))
         return false;
     
     if (m_optionElement->isDisabledFormControl())
         return false;
     
-    HTMLSelectElement* selectElement = listBoxOptionParentNode();
+    Handle<HTMLSelectElement> selectElement = listBoxOptionParentNode();
     if (selectElement && selectElement->isDisabledFormControl())
         return false;
     
     return true;
 }
     
 String AccessibilityListBoxOption::stringValue() const
 {
     if (!m_optionElement)
         return String();
@@ skipping 11 matching lines @@
     return String();
 }
 
 Element* AccessibilityListBoxOption::actionElement() const
 {
     return m_optionElement;
 }
 
 AccessibilityObject* AccessibilityListBoxOption::parentObject() const
 {
-    HTMLSelectElement* parentNode = listBoxOptionParentNode();
+    Handle<HTMLSelectElement> parentNode = listBoxOptionParentNode();
     if (!parentNode)
         return 0;
     
-    return m_optionElement->document()->axObjectCache()->getOrCreate(parentNode);
+    return m_optionElement->document()->axObjectCache()->getOrCreate(parentNode.raw());
 }
 
 void AccessibilityListBoxOption::setSelected(bool selected)
 {
-    HTMLSelectElement* selectElement = listBoxOptionParentNode();
+    Handle<HTMLSelectElement> selectElement = listBoxOptionParentNode();
     if (!selectElement)
         return;
     
     if (!canSetSelectedAttribute())
         return;
     
     bool isOptionSelected = isSelected();
     if ((isOptionSelected && selected) || (!isOptionSelected && !selected))
         return;
     
     // Convert from the entire list index to the option index.
     int optionIndex = selectElement->listToOptionIndex(listBoxOptionIndex());
     selectElement->accessKeySetSelectedIndex(optionIndex);
 }
 
-HTMLSelectElement* AccessibilityListBoxOption::listBoxOptionParentNode() const
+Result<HTMLSelectElement> AccessibilityListBoxOption::listBoxOptionParentNode() const
 {
     if (!m_optionElement)
-        return 0;
+        return nullptr;
     
     if (m_optionElement->hasTagName(optionTag))
         return static_cast<HTMLOptionElement*>(m_optionElement)->ownerSelectElement();
     
     if (m_optionElement->hasTagName(optgroupTag))
         return static_cast<HTMLOptGroupElement*>(m_optionElement)->ownerSelectElement();
     
-    return 0;
+    return nullptr;
 }
 
 int AccessibilityListBoxOption::listBoxOptionIndex() const
 {
     if (!m_optionElement)
         return -1;
     
-    HTMLSelectElement* selectElement = listBoxOptionParentNode();
+    Handle<HTMLSelectElement> selectElement = listBoxOptionParentNode();
     if (!selectElement) 
         return -1;
     
     const Vector<HTMLElement*>& listItems = selectElement->listItems();
     unsigned length = listItems.size();
     for (unsigned i = 0; i < length; i++)
         if (listItems[i] == m_optionElement)
             return i;
 
     return -1;
 }
 
 } // namespace WebCore