Pass undefined to JS builtins when called with implicit receiver.

test/mjsunit/regress/regress-485.js

Index: test/mjsunit/regress/regress-485.js
diff --git a/test/mjsunit/regress/regress-485.js b/test/mjsunit/regress/regress-485.js
index e5182b36b74088ae80e3611c47d66c4aea6a3bd2..f26e0eb111377356a9bc7c10b336a1eae4a43dc7 100755
--- a/test/mjsunit/regress/regress-485.js
+++ b/test/mjsunit/regress/regress-485.js
@@ -34,11 +34,6 @@ var global = this;
 var global2 = (function(){return this;})();
 assertEquals(global, global2, "direct call to local function returns global");
 
-var builtin = Object.prototype.valueOf;  // Builtin function that returns this.
-
-assertEquals(global, builtin(), "Direct call to builtin");
-
-
 // Builtin that depends on value of this to compute result.
 var builtin2 = Object.prototype.toString;