Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXMenuListPopup.h

Index: Source/modules/accessibility/AXMenuListPopup.h
diff --git a/Source/modules/accessibility/AXMenuListPopup.h b/Source/modules/accessibility/AXMenuListPopup.h
index 58327bd501025f3f148c62573b1a2d7923f8121e..ff2a6b6aba799ddb841792e4955a9a04a25d6b8e 100644
--- a/Source/modules/accessibility/AXMenuListPopup.h
+++ b/Source/modules/accessibility/AXMenuListPopup.h
@@ -36,7 +36,7 @@ class HTMLElement;
 
 class AXMenuListPopup final : public AXMockObject {
 public:
-    static PassRefPtr<AXMenuListPopup> create(AXObjectCacheImpl& axObjectCache) { return adoptRef(new AXMenuListPopup(axObjectCache)); }
+    static PassRefPtrWillBeRawPtr<AXMenuListPopup> create(AXObjectCacheImpl& axObjectCache) { return adoptRefWillBeNoop(new AXMenuListPopup(axObjectCache)); }
 
     virtual bool isEnabled() const override;
     virtual bool isOffScreen() const override;