[oilpan] The Node hierarchy should have correct accept method chains

Source/core/dom/StyledElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2010 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
  * License as published by the Free Software Foundation; either
@@ skipping 365 matching lines @@
 void StyledElement::addPropertyToPresentationAttributeStyle(Handle<MutableStylePropertySet> style, CSSPropertyID propertyID, double value, CSSPrimitiveValue::UnitTypes unit)
 {
     style->setProperty(propertyID, cssValuePool().createValue(value, unit));
 }
 
 void StyledElement::addPropertyToPresentationAttributeStyle(Handle<MutableStylePropertySet> style, CSSPropertyID propertyID, const String& value)
 {
     style->setProperty(propertyID, value, false, document()->elementSheet()->contents());
 }
 
+void StyledElement::acceptHeapVisitor(Visitor* visitor) const
+{
+    Element::acceptHeapVisitor(visitor);
 }
+
+}