Native context: debug.js does not load from js builtins object anymore.

src/harmony-object.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 
 (function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var GlobalObject = global.Object;
-
 var OwnPropertyKeys;
 
 utils.Import(function(from) {
   OwnPropertyKeys = from.OwnPropertyKeys;
 });
 
 // -------------------------------------------------------------------
 
 // ES6, draft 04-03-15, section 19.1.2.1
 function ObjectAssign(target, sources) {
@@ skipping 21 matching lines @@
   }
   return to;
 }
 
 // Set up non-enumerable functions on the Object object.
 utils.InstallFunctions(GlobalObject, DONT_ENUM, [
   "assign", ObjectAssign
 ]);
 
 })