Big merge from experimental to bleeding edge.

pkg/intl/lib/date_symbol_data_file.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.
 
 /**
  * This file should be imported, along with date_format.dart in order to read
  * locale data from files in the file system.
  */
 
 library date_symbol_data_json;
 
+import 'dart:async';
 import "date_symbols.dart";
 import "src/lazy_locale_data.dart";
 import 'src/date_format_internal.dart';
 import 'src/file_data_reader.dart';
 import 'dart:io';
 
 part "src/data/dates/localeList.dart";
 
 /**
  * This should be called for at least one [locale] before any date formatting
@@ skipping 12 matching lines @@
       (symbols, patterns) {
         return Futures.wait([
             symbols.initLocale(locale),
             patterns.initLocale(locale)]);
       });
 }
 
 /** Defines how new date symbol entries are created. */
 DateSymbols _createDateSymbol(Map map) {
   return new DateSymbols.deserializeFromMap(map);
-}
+}