Create pre-frozen change records for Object.observe

src/v8natives.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 900 matching lines @@
         return false;
       }
     }
     if (isObserved) {
       var new_desc = GetOwnProperty(obj, "length");
       var updated = length_desc.value_ !== new_desc.value_;
       var reconfigured = length_desc.writable_ !== new_desc.writable_ ||
           length_desc.configurable_ !== new_desc.configurable_ ||
           length_desc.enumerable_ !== new_desc.configurable_;
       if (updated || reconfigured) {
-        NotifyChange(reconfigured ? "reconfigured" : "updated",
-            obj, "length", length_desc.value_);
+        %EnqueueChangeRecord(obj, reconfigured ? "reconfigured" : "updated",
+            "length", length_desc.value_);
       }
     }
     return true;
   }
 
   // Step 4 - Special handling for array index.
   var index = ToUint32(p);
   if (index == ToNumber(p) && index != 4294967295) {
     var length = obj.length;
     var length_desc = GetOwnProperty(obj, "length");
@@ skipping 785 matching lines @@
 
 function SetUpFunction() {
   %CheckIsBootstrapping();
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "bind", FunctionBind,
     "toString", FunctionToString
   ));
 }
 
 SetUpFunction();