Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXMenuList.cpp

 /*
  * Copyright (C) 2010 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
 #include "modules/accessibility/AXMenuListPopup.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
 
 namespace blink {
 
 AXMenuList::AXMenuList(LayoutMenuList* layoutObject, AXObjectCacheImpl& axObjectCache)
     : AXLayoutObject(layoutObject, axObjectCache)
 {
 }
 
-PassRefPtr<AXMenuList> AXMenuList::create(LayoutMenuList* layoutObject, AXObjectCacheImpl& axObjectCache)
+PassRefPtrWillBeRawPtr<AXMenuList> AXMenuList::create(LayoutMenuList* layoutObject, AXObjectCacheImpl& axObjectCache)
 {
-    return adoptRef(new AXMenuList(layoutObject, axObjectCache));
+    return adoptRefWillBeNoop(new AXMenuList(layoutObject, axObjectCache));
 }
 
 AccessibilityRole AXMenuList::determineAccessibilityRole()
 {
     if ((m_ariaRole = determineAriaRoleAttribute()) != UnknownRole)
         return m_ariaRole;
 
     return PopUpButtonRole;
 }
 
@@ skipping 101 matching lines @@
         return;
 
     AXMenuListPopup* popup = toAXMenuListPopup(children()[0].get());
     popup->didHide();
 
     if (node() && node()->focused())
         axObjectCache().postNotification(this, AXObjectCacheImpl::AXFocusedUIElementChanged);
 }
 
 } // namespace blink