Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGTextPathElement.cpp

Index: Source/core/svg/SVGTextPathElement.cpp
diff --git a/Source/core/svg/SVGTextPathElement.cpp b/Source/core/svg/SVGTextPathElement.cpp
index af82cd9c0791b8fa35ea70a1df4529d7eab5b1cc..a9990f57196f20fc11ce94c61ac76aaf4301561b 100644
--- a/Source/core/svg/SVGTextPathElement.cpp
+++ b/Source/core/svg/SVGTextPathElement.cpp
@@ -68,6 +68,15 @@ SVGTextPathElement::~SVGTextPathElement()
 #endif
 }
 
+void SVGTextPathElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_startOffset);
+    visitor->trace(m_method);
+    visitor->trace(m_spacing);
+    SVGTextContentElement::trace(visitor);
+    SVGURIReference::trace(visitor);
+}
+
 void SVGTextPathElement::clearResourceReferences()
 {
     removeAllOutgoingReferences();