Oilpan: Prepare to move RenderObject and RenderObjectChildList to Oilpan heap.

Source/core/rendering/svg/RenderSVGContainer.cpp

Index: Source/core/rendering/svg/RenderSVGContainer.cpp
diff --git a/Source/core/rendering/svg/RenderSVGContainer.cpp b/Source/core/rendering/svg/RenderSVGContainer.cpp
index fe18b8efa64b66be0cbf6ef30301f2e1a4e34609..535942bf6e75ef910a908f25113b4b72b252d5eb 100644
--- a/Source/core/rendering/svg/RenderSVGContainer.cpp
+++ b/Source/core/rendering/svg/RenderSVGContainer.cpp
@@ -48,6 +48,12 @@ RenderSVGContainer::~RenderSVGContainer()
 {
 }
 
+void RenderSVGContainer::trace(Visitor* visitor)
+{
+    visitor->trace(m_children);
+    RenderSVGModelObject::trace(visitor);
+}
+
 void RenderSVGContainer::layout()
 {
     ASSERT(needsLayout());