Oilpan: move LiveNodeList collections to the heap.

Source/core/dom/ChildNodeList.cpp

Index: Source/core/dom/ChildNodeList.cpp
diff --git a/Source/core/dom/ChildNodeList.cpp b/Source/core/dom/ChildNodeList.cpp
index 8c72856e08ece51e5ed21997f0bc876decc3895b..c1a895cb932ef8eecadba7cf427c9f1c053b0440 100644
--- a/Source/core/dom/ChildNodeList.cpp
+++ b/Source/core/dom/ChildNodeList.cpp
@@ -41,7 +41,9 @@ Node* ChildNodeList::virtualOwnerNode() const
 
 ChildNodeList::~ChildNodeList()
 {
+#if !ENABLE(OILPAN)
     m_parent->nodeLists()->removeChildNodeList(this);
+#endif
 }
 
 Node* ChildNodeList::traverseForwardToOffset(unsigned offset, Node& currentNode, unsigned& currentOffset) const
@@ -66,4 +68,11 @@ Node* ChildNodeList::traverseBackwardToOffset(unsigned offset, Node& currentNode
     return 0;
 }
 
+void ChildNodeList::trace(Visitor* visitor)
+{
+    visitor->trace(m_parent);
+    visitor->trace(m_collectionIndexCache);
+    NodeList::trace(visitor);
+}
+
 } // namespace WebCore