Roll Observatory packages and add a roll script

intl/lib/intl_browser.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 provides facilities for Internationalization that are only available
- * when running in the web browser. You should import only one of this or
- * intl_standalone.dart. Right now the only thing provided here is the
- * ability to find the default locale from the browser.
- */
-
-library intl_browser;
-
-import "dart:async";
-import "dart:html";
-import "intl.dart";
-
-// TODO(alanknight): The need to do this by forcing the user to specially
-// import a particular library is a horrible hack, only done because there
-// seems to be no graceful way to do this at all. Either mirror access on
-// dart2js or the ability to do spawnUri in the browser would be promising
-// as ways to get rid of this requirement.
-/**
- * Find the system locale, accessed as window.navigator.language, and
- * set it as the default for internationalization operations in the
- * [Intl.systemLocale] variable.
- */
-Future<String> findSystemLocale() {
-  Intl.systemLocale = Intl.canonicalizedLocale(window.navigator.language);
-  return new Future.value(Intl.systemLocale);
-}