Tweak error message

src/messages.js

 // Copyright 2012 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 55 matching lines @@
   non_object_property_store:     ["Cannot set property '", "%0", "' of ", "%1"],
   non_object_property_call:      ["Cannot call method '", "%0", "' of ", "%1"],
   with_expression:               ["%0", " has no properties"],
   illegal_invocation:            ["Illegal invocation"],
   no_setter_in_callback:         ["Cannot set property ", "%0", " of ", "%1", " which has only a getter"],
   apply_non_function:            ["Function.prototype.apply was called on ", "%0", ", which is a ", "%1", " and not a function"],
   apply_wrong_args:              ["Function.prototype.apply: Arguments list has wrong type"],
   invalid_in_operator_use:       ["Cannot use 'in' operator to search for '", "%0", "' in ", "%1"],
   instanceof_function_expected:  ["Expecting a function in instanceof check, but got ", "%0"],
   instanceof_nonobject_proto:    ["Function has non-object prototype '", "%0", "' in instanceof check"],
-  null_to_object:                ["Cannot convert null to object"],
+  undefined_or_null_to_object:   ["Cannot convert undefined or null to object"],
   reduce_no_initial:             ["Reduce of empty array with no initial value"],
   getter_must_be_callable:       ["Getter must be a function: ", "%0"],
   setter_must_be_callable:       ["Setter must be a function: ", "%0"],
   value_and_accessor:            ["Invalid property.  A property cannot both have accessors and be writable or have a value, ", "%0"],
   proto_object_or_null:          ["Object prototype may only be an Object or null"],
   property_desc_object:          ["Property description must be an object: ", "%0"],
   redefine_disallowed:           ["Cannot redefine property: ", "%0"],
   define_disallowed:             ["Cannot define property:", "%0", ", object is not extensible."],
   non_extensible_proto:          ["%0", " is not extensible"],
   handler_non_object:            ["Proxy.", "%0", " called with non-object as handler"],
@@ skipping 1247 matching lines @@
     %SetOverflowedStackTrace(this, void 0);
   }
 
   %DefineOrRedefineAccessorProperty(
       boilerplate, 'stack', getter, setter, DONT_ENUM);
 
   return boilerplate;
 }
 
 var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();