Cosmetic: Add macros for NaN, undefined and Infinity to native js code.

src/proxy.js

 // 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 22 matching lines @@
 
 var $Proxy = new $Object();
 
 // -------------------------------------------------------------------
 
 function ProxyCreate(handler, proto) {
   if (!IS_SPEC_OBJECT(handler))
     throw MakeTypeError("handler_non_object", ["create"])
   if (IS_UNDEFINED(proto))
     proto = null
-  else if (!(IS_SPEC_OBJECT(proto) || proto === null))
+  else if (!(IS_SPEC_OBJECT(proto) || IS_NULL(proto)))
     throw MakeTypeError("proto_non_object", ["create"])
   return %CreateJSProxy(handler, proto)
 }
 
 function ProxyCreateFunction(handler, callTrap, constructTrap) {
   if (!IS_SPEC_OBJECT(handler))
     throw MakeTypeError("handler_non_object", ["create"])
   if (!IS_SPEC_FUNCTION(callTrap))
     throw MakeTypeError("trap_function_expected", ["createFunction", "call"])
   if (IS_UNDEFINED(constructTrap)) {
     constructTrap = DerivedConstructTrap(callTrap)
   } else if (IS_SPEC_FUNCTION(constructTrap)) {
     // Make sure the trap receives 'undefined' as this.
     var construct = constructTrap
     constructTrap = function() {
-      return %Apply(construct, void 0, arguments, 0, %_ArgumentsLength());
+      return %Apply(construct, UNDEFINED, arguments, 0, %_ArgumentsLength());
     }
   } else {
     throw MakeTypeError("trap_function_expected",
                         ["createFunction", "construct"])
   }
   return %CreateJSFunctionProxy(
     handler, callTrap, constructTrap, $Function.prototype)
 }
 
 
@@ skipping 134 matching lines @@
 }
 
 function ProxyEnumerate(proxy) {
   var handler = %GetHandler(proxy)
   if (IS_UNDEFINED(handler.enumerate)) {
     return %Apply(DerivedEnumerateTrap, handler, [], 0, 0)
   } else {
     return ToNameArray(handler.enumerate(), "enumerate", false)
   }
 }