Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXTable.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 47 matching lines @@
 AXTable::~AXTable()
 {
 }
 
 void AXTable::init()
 {
     AXLayoutObject::init();
     m_isAXTable = isTableExposableThroughAccessibility();
 }
 
-PassRefPtr<AXTable> AXTable::create(LayoutObject* layoutObject, AXObjectCacheImpl& axObjectCache)
+PassRefPtrWillBeRawPtr<AXTable> AXTable::create(LayoutObject* layoutObject, AXObjectCacheImpl& axObjectCache)
 {
-    return adoptRef(new AXTable(layoutObject, axObjectCache));
+    return adoptRefWillBeNoop(new AXTable(layoutObject, axObjectCache));
 }
 
 bool AXTable::hasARIARole() const
 {
     if (!m_layoutObject)
         return false;
 
     AccessibilityRole ariaRole = ariaRoleAttribute();
     if (ariaRole != UnknownRole)
         return true;
@@ skipping 504 matching lines @@
             title = caption->innerText();
     }
 
     // try the standard
     if (title.isEmpty())
         title = AXLayoutObject::deprecatedTitle(mode);
 
     return title;
 }
 
+DEFINE_TRACE(AXTable)
+{
+    visitor->trace(m_rows);
+    visitor->trace(m_columns);
+    visitor->trace(m_headerContainer);
+    AXLayoutObject::trace(visitor);
+}
+
 } // namespace blink