Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGCursorElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 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,
@@ skipping 87 matching lines @@
     SVGElement::InvalidationGuard invalidationGuard(this);
 
     // Any change of a cursor specific attribute triggers this recalc.
     for (const auto& client : m_clients)
         client->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SVGCursor));
 }
 
 void SVGCursorElement::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
+    visitor->trace(m_x);
+    visitor->trace(m_y);
     visitor->trace(m_clients);
 #endif
     SVGElement::trace(visitor);
+    SVGTests::trace(visitor);
+    SVGURIReference::trace(visitor);
 }
 
 } // namespace blink