Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXInlineTextBox.cpp

 /*
  * Copyright (C) 2013, Google 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 34 matching lines @@
     , m_inlineTextBox(inlineTextBox)
 {
 }
 
 AXInlineTextBox::~AXInlineTextBox()
 {
     if (m_axObjectCache && m_inlineTextBox)
         m_axObjectCache->remove(m_inlineTextBox.get());
 }
 
-PassRefPtr<AXInlineTextBox> AXInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox, AXObjectCacheImpl* axObjectCache)
+PassRefPtrWillBeRawPtr<AXInlineTextBox> AXInlineTextBox::create(PassRefPtr<AbstractInlineTextBox> inlineTextBox, AXObjectCacheImpl* axObjectCache)
 {
-    return adoptRef(new AXInlineTextBox(inlineTextBox, axObjectCache));
+    return adoptRefWillBeNoop(new AXInlineTextBox(inlineTextBox, axObjectCache));
 }
 
 void AXInlineTextBox::init()
 {
 }
 
 void AXInlineTextBox::detach()
 {
     m_inlineTextBox = nullptr;
-    m_axObjectCache = 0;
+    m_axObjectCache = nullptr;
     AXObject::detach();
 }
 
 LayoutRect AXInlineTextBox::elementRect() const
 {
     if (!m_inlineTextBox)
         return LayoutRect();
 
     return m_inlineTextBox->bounds();
 }
@@ skipping 99 matching lines @@
     if (previousOnLine)
         return m_axObjectCache->getOrCreate(previousOnLine.get());
 
     if (!m_inlineTextBox->isFirst())
         return 0;
 
     return parentObject()->previousOnLine();
 }
 
 } // namespace blink