Oilpan: |SVGViewSpec::m_contextElement| should be a member.

Source/core/svg/SVGViewSpec.cpp

 /*
  * Copyright (C) 2007, 2010 Rob Buis <buis@kde.org>
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 196 matching lines @@
     }
 
     if (ptr >= end || *ptr != ')')
         return false;
 
     return true;
 }
 
 void SVGViewSpec::trace(Visitor* visitor)
 {
-    visitor->registerWeakMembers<SVGViewSpec, &SVGViewSpec::clearWeakMembers>(this);
-}
-
-void SVGViewSpec::clearWeakMembers(Visitor* visitor)
-{
-    if (!visitor->isAlive(m_contextElement))
-        detachContextElement();
+    visitor->trace(m_contextElement);
 }
 
 }