Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGTextPositioningElement.cpp

Index: Source/core/svg/SVGTextPositioningElement.cpp
diff --git a/Source/core/svg/SVGTextPositioningElement.cpp b/Source/core/svg/SVGTextPositioningElement.cpp
index 32b6e3b3cd3f7754df48ae5762f0c16d5e0ec383..3f6742f9f5c2eda29852933c33d5250679eec217 100644
--- a/Source/core/svg/SVGTextPositioningElement.cpp
+++ b/Source/core/svg/SVGTextPositioningElement.cpp
@@ -44,6 +44,16 @@ SVGTextPositioningElement::SVGTextPositioningElement(const QualifiedName& tagNam
     addToPropertyMap(m_rotate);
 }
 
+void SVGTextPositioningElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_x);
+    visitor->trace(m_y);
+    visitor->trace(m_dx);
+    visitor->trace(m_dy);
+    visitor->trace(m_rotate);
+    SVGTextContentElement::trace(visitor);
+}
+
 bool SVGTextPositioningElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());