Fix the tests that change because of change to toISOString format.

test/mjsunit/json.js

 // Copyright 2009 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 47 matching lines @@
 GenericToJSONChecks(Boolean, true, false);
 GenericToJSONChecks(Boolean, false, true);
 
 // String toJSON
 assertEquals("flot", "flot".toJSON());
 assertEquals("flot", "flot".toJSON(3));
 assertEquals("tolf", (new String("tolf")).toJSON());
 GenericToJSONChecks(String, "x", "y");
 
 // Date toJSON
-assertEquals("1970-01-01T00:00:00Z", new Date(0).toJSON());
-assertEquals("1979-01-11T08:00:00Z", new Date("1979-01-11 08:00 GMT").toJSON());
-assertEquals("2005-05-05T05:05:05Z", new Date("2005-05-05 05:05:05 GMT").toJSON());
+assertEquals("1970-01-01T00:00:00.000Z", new Date(0).toJSON());
+assertEquals("1979-01-11T08:00:00.000Z", new Date("1979-01-11 08:00 GMT").toJSON());
+assertEquals("2005-05-05T05:05:05.000Z", new Date("2005-05-05 05:05:05 GMT").toJSON());
 var n1 = new Date(10000);
 n1.toISOString = function () { return "foo"; };
 assertEquals("foo", n1.toJSON());
 var n2 = new Date(10001);
 n2.toISOString = null;
 assertThrows(function () { n2.toJSON(); }, TypeError);
 var n3 = new Date(10002);
 n3.toISOString = function () { return {}; };
 assertThrows(function () { n3.toJSON(); }, TypeError, "result_not_primitive");
 var n4 = new Date(10003);
@@ skipping 117 matching lines @@
 
 function checkIllegal(str) {
   assertThrows(function () { JSON.parse(str); }, SyntaxError);
 }
 
 checkIllegal('1); throw "foo"; (1');
 
 var x = 0;
 eval("(1); x++; (1)");
 checkIllegal('1); x++; (1');