Make sure double to DateTime conversion never throws.

tools/dom/src/native_DOMImplementation.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 class _Utils {
   static double dateTimeToDouble(DateTime dateTime) =>
       dateTime.millisecondsSinceEpoch.toDouble();
-  static DateTime doubleToDateTime(double dateTime) =>
-      new DateTime.fromMillisecondsSinceEpoch(dateTime.toInt());
+  static DateTime doubleToDateTime(double dateTime) {
+    try {
+      return new DateTime.fromMillisecondsSinceEpoch(dateTime.toInt());
+    } catch {
+      // TODO(antonnm): treat exceptions properly in bindings and
+      // find out how to treat NaNs.
+      return null;
+    }
+  }
 
   static List convertToList(List list) {
     // FIXME: [possible optimization]: do not copy the array if Dart_IsArray is fine w/ it.
     final length = list.length;
     List result = new List(length);
     result.setRange(0, length, list);
     return result;
   }
 
   static List convertMapToList(Map map) {
@@ skipping 90 matching lines @@
   bool get isEmpty => Maps.isEmpty(this);
 }
 
 get _printClosure => (s) {
   try {
     window.console.log(s);
   } catch (_) {
     _Utils.print(s);
   }
 };