Use function wrapper argument to expose internal arrays to native scripts.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 4823243f2384b510771dd53a76dfa3bdb80c9471..c2788dd49f00d119b8d5181fbaecd5661ab3e81e 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1694,9 +1694,6 @@ class JSReceiver: public HeapObject {
 // Forward declaration for JSObject::GetOrCreateHiddenPropertiesHashTable.
 class ObjectHashTable;
 
-// Forward declaration for JSObject::Copy.
-class AllocationSite;
-
 
 // The JSObject describes real heap allocated JavaScript objects with
 // properties.
@@ -1733,6 +1730,7 @@ class JSObject: public JSReceiver {
   DECL_ACCESSORS(elements, FixedArrayBase)
   inline void initialize_elements();
   static void ResetElements(Handle<JSObject> object);
+  static void ResetProperties(Handle<JSObject> object);

[Jakob Kummerow, 2015/05/11 15:25:26]

I see no implementation and no callers of this.

   static inline void SetMapAndElements(Handle<JSObject> object,
                                        Handle<Map> map,
                                        Handle<FixedArrayBase> elements);
@@ -2157,7 +2155,6 @@ class JSObject: public JSReceiver {
   // Copy object.
   enum DeepCopyHints { kNoHints = 0, kObjectIsShallow = 1 };
 
-  static Handle<JSObject> Copy(Handle<JSObject> object);
   MUST_USE_RESULT static MaybeHandle<JSObject> DeepCopy(
       Handle<JSObject> object,
       AllocationSiteUsageContext* site_context,