Async initialization for DateFormat

pkg/intl/data/dates/localeList.dart

Index: pkg/intl/data/dates/localeList.dart
===================================================================
--- pkg/intl/data/dates/localeList.dart	(revision 0)
+++ pkg/intl/data/dates/localeList.dart	(revision 0)
@@ -0,0 +1,85 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this sourcecode is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// Hard-coded list of all available locales for dates.
+final availableLocalesForDateFormatting = const ["en_ISO",
+    "af",
+    "am",
+    "ar",
+    "bg",
+    "bn",
+    "ca",
+    "cs",
+    "da",
+    "de",
+    "de_AT",
+    "de_CH",
+    "el",
+    "en",
+    "en_AU",
+    "en_GB",
+    "en_IE",
+    "en_IN",
+    "en_SG",
+    "en_US",
+    "en_ZA",
+    "es",
+    "es_419",
+    "et",
+    "eu",
+    "fa",
+    "fi",
+    "fil",
+    "fr",
+    "fr_CA",
+    "gl",
+    "gsw",
+    "gu",
+    "he",
+    "hi",
+    "hr",
+    "hu",
+    "id",
+    "in",
+    "is",
+    "it",
+    "iw",
+    "ja",
+    "kn",
+    "ko",
+    "ln",
+    "lt",
+    "lv",
+    "ml",
+    "mr",
+    "ms",
+    "mt",
+    "nl",
+    "no",
+    "or",
+    "pl",
+    "pt",
+    "pt_BR",
+    "pt_PT",
+    "ro",
+    "ru",
+    "sk",
+    "sl",
+    "sq",
+    "sr",
+    "sv",
+    "sw",
+    "ta",
+    "te",
+    "th",
+    "tl",
+    "tr",
+    "uk",
+    "ur",
+    "vi",
+    "zh",
+    "zh_CN",
+    "zh_HK",
+    "zh_TW",
+    "zu"];