Fixing DateTime values in dart2js serialized script values.

tools/dom/src/dart2js_Conversions.dart

Index: tools/dom/src/dart2js_Conversions.dart
diff --git a/tools/dom/src/dart2js_Conversions.dart b/tools/dom/src/dart2js_Conversions.dart
index 0ca42168b7a9554da64b71812185d52d73d8a705..668ba3bec29a6ead8a00cfc81a0203014f2668b1 100644
--- a/tools/dom/src/dart2js_Conversions.dart
+++ b/tools/dom/src/dart2js_Conversions.dart
@@ -11,15 +11,6 @@
 
 part of html;
 
-DateTime _convertNativeToDart_DateTime(date) {
-  var millisSinceEpoch = JS('int', '#.getTime()', date);
-  return new DateTime.fromMillisecondsSinceEpoch(millisSinceEpoch, isUtc: true);
-}
-
-_convertDartToNative_DateTime(DateTime date) {
-  return JS('', 'new Date(#)', date.millisecondsSinceEpoch);
-}
-
 WindowBase _convertNativeToDart_Window(win) {
   if (win == null) return null;
   return _DOMWindowCrossFrame._createSafe(win);