Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPatternElement.cpp

Index: Source/core/svg/SVGPatternElement.cpp
diff --git a/Source/core/svg/SVGPatternElement.cpp b/Source/core/svg/SVGPatternElement.cpp
index dab95f87e39f38602559bf92503007bd1770fc41..3b4d2eace7277a207f690b92ebe5b95aa0adbd04 100644
--- a/Source/core/svg/SVGPatternElement.cpp
+++ b/Source/core/svg/SVGPatternElement.cpp
@@ -53,6 +53,21 @@ inline SVGPatternElement::SVGPatternElement(Document& document)
     addToPropertyMap(m_patternContentUnits);
 }
 
+void SVGPatternElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_x);
+    visitor->trace(m_y);
+    visitor->trace(m_width);
+    visitor->trace(m_height);
+    visitor->trace(m_patternTransform);
+    visitor->trace(m_patternUnits);
+    visitor->trace(m_patternContentUnits);
+    SVGElement::trace(visitor);
+    SVGURIReference::trace(visitor);
+    SVGTests::trace(visitor);
+    SVGFitToViewBox::trace(visitor);
+}
+
 DEFINE_NODE_FACTORY(SVGPatternElement)
 
 bool SVGPatternElement::isSupportedAttribute(const QualifiedName& attrName)