Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXMenuList.cpp

Index: Source/modules/accessibility/AXMenuList.cpp
diff --git a/Source/modules/accessibility/AXMenuList.cpp b/Source/modules/accessibility/AXMenuList.cpp
index fa80d6b4a1759780766c479905488a7208f8a3bd..4a7aef593ee376a5fda994ae0e7dfd0807a93669 100644
--- a/Source/modules/accessibility/AXMenuList.cpp
+++ b/Source/modules/accessibility/AXMenuList.cpp
@@ -37,9 +37,9 @@ AXMenuList::AXMenuList(LayoutMenuList* layoutObject, AXObjectCacheImpl* axObject
 {
 }
 
-PassRefPtr<AXMenuList> AXMenuList::create(LayoutMenuList* layoutObject, AXObjectCacheImpl* axObjectCache)
+PassRefPtrWillBeRawPtr<AXMenuList> AXMenuList::create(LayoutMenuList* layoutObject, AXObjectCacheImpl* axObjectCache)
 {
-    return adoptRef(new AXMenuList(layoutObject, axObjectCache));
+    return adoptRefWillBeNoop(new AXMenuList(layoutObject, axObjectCache));
 }
 
 AccessibilityRole AXMenuList::determineAccessibilityRole()
@@ -88,7 +88,11 @@ void AXMenuList::addChildren()
 
     toAXMockObject(list)->setParent(this);
     if (list->accessibilityIsIgnored()) {
+#if ENABLE(OILPAN)
+        cache->remove(list);
+#else
         cache->remove(list->axObjectID());
+#endif
         return;
     }