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

Source/core/rendering/RenderTableSection.cpp

Index: Source/core/rendering/RenderTableSection.cpp
diff --git a/Source/core/rendering/RenderTableSection.cpp b/Source/core/rendering/RenderTableSection.cpp
index 60ad60b407346efcd55964c660e96dc67e93985f..ddfe5198ff651aff5a8cf6747aea1244fca71d17 100644
--- a/Source/core/rendering/RenderTableSection.cpp
+++ b/Source/core/rendering/RenderTableSection.cpp
@@ -97,6 +97,12 @@ RenderTableSection::~RenderTableSection()
 {
 }
 
+void RenderTableSection::trace(Visitor* visitor)
+{
+    visitor->trace(m_children);
+    RenderBox::trace(visitor);
+}
+
 void RenderTableSection::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
     RenderBox::styleDidChange(diff, oldStyle);