[date] Migrate Date field accessors to native builtins.

test/mjsunit/date.js

 // Copyright 2008 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 310 matching lines @@
     assertEquals(70674603500 - ms, Date.parse(string), string);
   }
 }
 
 assertThrows('Date.prototype.setTime.call("", 1);', TypeError);
 assertThrows('Date.prototype.setYear.call("", 1);', TypeError);
 assertThrows('Date.prototype.setHours.call("", 1, 2, 3, 4);', TypeError);
 assertThrows('Date.prototype.getDate.call("");', TypeError);
 assertThrows('Date.prototype.getUTCDate.call("");', TypeError);
 
-var date = new Date();
-date.getTime();
-date.getTime();
-%OptimizeFunctionOnNextCall(Date.prototype.getTime);
-assertThrows(function() { Date.prototype.getTime.call(""); }, TypeError);
-assertUnoptimized(Date.prototype.getTime);
+assertThrows(function() { Date.prototype.getTime.call(0) }, TypeError);
+assertThrows(function() { Date.prototype.getTime.call("") }, TypeError);
 
-date.getYear();
-date.getYear();
-%OptimizeFunctionOnNextCall(Date.prototype.getYear);
-assertThrows(function() { Date.prototype.getYear.call(""); }, TypeError);
-assertUnoptimized(Date.prototype.getYear);
+assertThrows(function() { Date.prototype.getYear.call(0) }, TypeError);
+assertThrows(function() { Date.prototype.getYear.call("") }, TypeError);
 
 (function TestDatePrototypeOrdinaryObject() {
   assertEquals(Object.prototype, Date.prototype.__proto__);
   assertThrows(function () { Date.prototype.toString() }, TypeError);
 })();
 
 delete Date.prototype.getUTCFullYear;
 delete Date.prototype.getUTCMonth;
 delete Date.prototype.getUTCDate;
 delete Date.prototype.getUTCHours;
 delete Date.prototype.getUTCMinutes;
 delete Date.prototype.getUTCSeconds;
 delete Date.prototype.getUTCMilliseconds;
-date.toISOString();
+(new Date()).toISOString();
 
 (function TestDeleteToString() {
   assertTrue(delete Date.prototype.toString);
   assertTrue('[object Date]' !== Date());
 })();