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 69f9171883b1fb0b6e45c95967d2ac6722a75a9e..e1795f8808443e7a608978a14418de07e473a9f2 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());