Oilpan: move SVG property hierarchy to the heap.

Source/platform/graphics/filters/FilterEffect.cpp

 /*
  * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2012 University of Szeged
  * Copyright (C) 2013 Google 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 31 matching lines @@
     , m_operatingColorSpace(ColorSpaceLinearRGB)
     , m_resultColorSpace(ColorSpaceDeviceRGB)
 {
     ASSERT(m_filter);
 }
 
 FilterEffect::~FilterEffect()
 {
 }
 
+void FilterEffect::trace(Visitor* visitor)
+{
+    visitor->trace(m_inputEffects);
+}
+
 float FilterEffect::maxFilterArea()
 {
     return kMaxFilterArea;
 }
 
 bool FilterEffect::isFilterSizeValid(const FloatRect& rect)
 {
     if (rect.width() < 0 || rect.height() < 0
         ||  (rect.height() * rect.width() > kMaxFilterArea))
         return false;
@@ skipping 218 matching lines @@
     return m_imageFilters[index].get();
 }
 
 void FilterEffect::setImageFilter(ColorSpace colorSpace, bool requiresPMColorValidation, PassRefPtr<SkImageFilter> imageFilter)
 {
     int index = getImageFilterIndex(colorSpace, requiresPMColorValidation);
     m_imageFilters[index] = imageFilter;
 }
 
 } // namespace blink