Use NativesFlag to allow/disallow natives syntax during compilation.

src/parser.cc

 // Copyright 2010 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 5115 matching lines @@
 
 bool ParserApi::Parse(CompilationInfo* info) {
   ASSERT(info->function() == NULL);
   FunctionLiteral* result = NULL;
   Handle<Script> script = info->script();
   if (info->is_lazy()) {
     Parser parser(script, true, NULL, NULL);
     result = parser.ParseLazy(info);
   } else {
     bool allow_natives_syntax =
-        FLAG_allow_natives_syntax || Bootstrapper::IsActive();
+        info->allows_natives_syntax() || FLAG_allow_natives_syntax;
     ScriptDataImpl* pre_data = info->pre_parse_data();
     Parser parser(script, allow_natives_syntax, info->extension(), pre_data);
     if (pre_data != NULL && pre_data->has_error()) {
       Scanner::Location loc = pre_data->MessageLocation();
       const char* message = pre_data->BuildMessage();
       Vector<const char*> args = pre_data->BuildArgs();
       parser.ReportMessageAt(loc, message, args);
       DeleteArray(message);
       for (int i = 0; i < args.length(); i++) {
         DeleteArray(args[i]);
       }
       DeleteArray(args.start());
       ASSERT(Top::has_pending_exception());
     } else {
       Handle<String> source = Handle<String>(String::cast(script->source()));
       result = parser.ParseProgram(source,
                                    info->is_global(),
                                    info->StrictMode());
     }
   }
 
   info->SetFunction(result);
   return (result != NULL);
 }
 
 } }  // namespace v8::internal