Oilpan: Replace RefPtrs to Node and its subclasses in core/html with Oilpan transitin types.

Source/core/html/HTMLTableElement.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 196 matching lines @@
                 if (i != index) {
                     exceptionState.throwDOMException(IndexSizeError, "The index provided (" + String::number(index) + ") is greater than the number of rows in the table (" + String::number(i) + ").");
                     return nullptr;
                 }
                 break;
             }
             lastRow = row;
         }
     }
 
-    RefPtr<ContainerNode> parent;
+    RefPtrWillBeRawPtr<ContainerNode> parent;
     if (lastRow)
         parent = row ? row->parentNode() : lastRow->parentNode();
     else {
         parent = lastBody();
         if (!parent) {
             RefPtrWillBeRawPtr<HTMLTableSectionElement> newBody = HTMLTableSectionElement::create(tbodyTag, document());
             RefPtrWillBeRawPtr<HTMLTableRowElement> newRow = HTMLTableRowElement::create(document());
             newBody->appendChild(newRow, exceptionState);
             appendChild(newBody.release(), exceptionState);
             return newRow.release();
@@ skipping 347 matching lines @@
     return getAttribute(summaryAttr);
 }
 
 void HTMLTableElement::trace(Visitor* visitor)
 {
     visitor->trace(m_sharedCellStyle);
     HTMLElement::trace(visitor);
 }
 
 }