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 2172695e78030f8d8a6254a3eba886fba21106cd..b390cc3a554092e10cb2a076f828c9c8fe48e4dc 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.
@@ -2157,7 +2154,6 @@ 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,