Oilpan: move LiveNodeList collections to the heap.

Source/core/html/LabelsNodeList.h

Index: Source/core/html/LabelsNodeList.h
diff --git a/Source/core/html/LabelsNodeList.h b/Source/core/html/LabelsNodeList.h
index fd0b055a0e6a5dd47c20977d0a445d45eb95536e..4a8a485be33e9ee02c6abe58c3065d44c95cd08d 100644
--- a/Source/core/html/LabelsNodeList.h
+++ b/Source/core/html/LabelsNodeList.h
@@ -32,10 +32,10 @@ namespace WebCore {
 
 class LabelsNodeList FINAL : public LiveNodeList {
 public:
-    static PassRefPtr<LabelsNodeList> create(ContainerNode& ownerNode, CollectionType type)
+    static PassRefPtrWillBeRawPtr<LabelsNodeList> create(ContainerNode& ownerNode, CollectionType type)
     {
         ASSERT_UNUSED(type, type == LabelsNodeListType);
-        return adoptRef(new LabelsNodeList(ownerNode));
+        return adoptRefWillBeNoop(new LabelsNodeList(ownerNode));
     }
 
     virtual ~LabelsNodeList();