Pass undefined to JS builtins when called with implicit receiver.

src/heap.cc

 // Copyright 2011 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 2370 matching lines @@
   share->set_inferred_name(empty_string());
   share->set_compiler_hints(0);
   share->set_deopt_counter(Smi::FromInt(FLAG_deopt_every_n_times));
   share->set_initial_map(undefined_value());
   share->set_this_property_assignments_count(0);
   share->set_this_property_assignments(undefined_value());
   share->set_opt_count(0);
   share->set_num_literals(0);
   share->set_end_position(0);
   share->set_function_token_position(0);
-  share->set_es5_native(false);
+  share->set_native(false);
   return result;
 }
 
 
 MaybeObject* Heap::AllocateJSMessageObject(String* type,
                                            JSArray* arguments,
                                            int start_position,
                                            int end_position,
                                            Object* script,
                                            Object* stack_trace,
@@ skipping 3519 matching lines @@
 }
 
 
 void ExternalStringTable::TearDown() {
   new_space_strings_.Free();
   old_space_strings_.Free();
 }
 
 
 } }  // namespace v8::internal