Oilpan: move SVG property hierarchy to the heap.

Source/core/rendering/svg/RenderSVGResourcePattern.cpp

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright 2014 The Chromium Authors. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 26 matching lines @@
     RefPtr<Pattern> pattern;
     AffineTransform transform;
 };
 
 RenderSVGResourcePattern::RenderSVGResourcePattern(SVGPatternElement* node)
     : RenderSVGResourcePaintServer(node)
     , m_shouldCollectPatternAttributes(true)
 {
 }
 
+void RenderSVGResourcePattern::trace(Visitor* visitor)
+{
+    visitor->trace(m_attributes);
+    RenderSVGResourcePaintServer::trace(visitor);
+}
+
 void RenderSVGResourcePattern::removeAllClientsFromCache(bool markForInvalidation)
 {
     m_patternMap.clear();
     m_shouldCollectPatternAttributes = true;
     markAllClientsForInvalidation(markForInvalidation ? PaintInvalidation : ParentOnlyInvalidation);
 }
 
 void RenderSVGResourcePattern::removeClientFromCache(RenderObject* client, bool markForInvalidation)
 {
     ASSERT(client);
@@ skipping 109 matching lines @@
     ASSERT(!patternRenderer->needsLayout());
 
     SubtreeContentTransformScope contentTransformScope(contentTransform);
     for (RenderObject* child = patternRenderer->firstChild(); child; child = child->nextSibling())
         SVGRenderingContext::renderSubtree(&recordingContext, child);
 
     return recordingContext.endRecording();
 }
 
 }