Oilpan: move LiveNodeList collections to the heap.

Source/core/dom/NodeList.h

Index: Source/core/dom/NodeList.h
diff --git a/Source/core/dom/NodeList.h b/Source/core/dom/NodeList.h
index 76c51dae695d72694d45b99f3ee92b2bc83ad55c..6f27c5e8b65b7b829953460ef438bff20f9ff0ee 100644
--- a/Source/core/dom/NodeList.h
+++ b/Source/core/dom/NodeList.h
@@ -32,7 +32,7 @@ namespace WebCore {
 
 class Node;
 
-class NodeList : public ScriptWrappable, public RefCounted<NodeList> {
+class NodeList : public RefCountedWillBeGarbageCollectedFinalized<NodeList>, public ScriptWrappable {
 public:
     virtual ~NodeList() { }
 
@@ -46,6 +46,8 @@ public:
 
     virtual Node* virtualOwnerNode() const { return 0; }
 
+    virtual void trace(Visitor*) { }
+
 protected:
     NodeList()
     {