Fix receiver for calls to strict-mode and builtin functions that are

test/mjsunit/regress/regress-124.js

 // Copyright 2008 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 19 matching lines @@
 
 assertEquals("[object global]", eval("this.toString()"));
 assertEquals("[object Undefined]", eval("toString()"));
 
 assertEquals("[object global]", eval("var f; this.toString()"));
 assertEquals("[object Undefined]", eval("var f; toString()"));
 
 
 function F(f) {
   assertEquals("[object global]", this.toString());
-  assertEquals("[object global]", toString());
+  assertEquals("[object Undefined]", toString());
 
   assertEquals("[object global]", eval("this.toString()"));
-  assertEquals("[object global]", eval("toString()"));
+  assertEquals("[object Undefined]", eval("toString()"));
 
   assertEquals("[object global]", eval("var f; this.toString()"));
-  assertEquals("[object global]", eval("var f; toString()"));
+  assertEquals("[object Undefined]", eval("var f; toString()"));
 
   assertEquals("[object Undefined]", eval("f()"));
 
   // Receiver should be the arguments object here.
   assertEquals("[object Arguments]", eval("arguments[0]()"));
   with (arguments) {
     assertEquals("[object Arguments]", toString());
   }
 }
 
 F(Object.prototype.toString);