Migrate error messages, part 5 (array.js and i18n.js).

src/date.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file relies on the fact that the following declarations have been made
 // in v8natives.js:
 // var $isFinite = GlobalIsFinite;
 
 var $createDate;
 
 // -------------------------------------------------------------------
 
 (function() {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 var GlobalDate = global.Date;
 
 // This file contains date support implemented in JavaScript.
 
-// Helper function to throw error.
-function ThrowDateTypeError() {
-  throw new $TypeError('this is not a Date object.');
-}
-
 var timezone_cache_time = NAN;
 var timezone_cache_timezone;
 
 function LocalTimezone(t) {
   if (NUMBER_IS_NAN(t)) return "";
   CheckDateCacheCurrent();
   if (t == timezone_cache_time) {
     return timezone_cache_timezone;
   }
   var timezone = %DateLocalTimezone(t);
@@ skipping 784 matching lines @@
   "getYear", DateGetYear,
   "setYear", DateSetYear,
   "toISOString", DateToISOString,
   "toJSON", DateToJSON
 ]);
 
 // Expose to the global scope.
 $createDate = CreateDate;
 
 })();