Fix map space explosion from changing the arguments and caller properties on native functions.

src/v8natives.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 37 matching lines @@
 // Helper function used to install functions on objects.
 function InstallFunctions(object, attributes, functions) {
   if (functions.length >= 8) {
     %OptimizeObjectForAddingMultipleProperties(object, functions.length >> 1);
   }
   for (var i = 0; i < functions.length; i += 2) {
     var key = functions[i];
     var f = functions[i + 1];
     %FunctionSetName(f, key);
     %FunctionRemovePrototype(f);
-    // We match firefox on this, but not Safari (which does not have the
-    // property at all).
-    %IgnoreAttributesAndSetProperty(f, "caller",
-                                    null,
-                                    DONT_ENUM | DONT_DELETE);
-    %IgnoreAttributesAndSetProperty(f, "arguments",
-                                    null,
-                                    DONT_ENUM | DONT_DELETE);
-
     %SetProperty(object, key, f, attributes);
     %SetNativeFlag(f);
   }
   %ToFastProperties(object);
 }
 
 // Emulates JSC by installing functions on a hidden prototype that
 // lies above the current object/prototype.  This lets you override
 // functions on String.prototype etc. and then restore the old function
 // with delete.  See http://code.google.com/p/chromium/issues/detail?id=1717
@@ skipping 1475 matching lines @@
 
 function SetUpFunction() {
   %CheckIsBootstrapping();
   InstallFunctions($Function.prototype, DONT_ENUM, $Array(
     "bind", FunctionBind,
     "toString", FunctionToString
   ));
 }
 
 SetUpFunction();