Update charted to 0.4.8 and roll

packages/intl/test/date_time_format_test_stub.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.
 
-/**
- * Test date formatting and parsing using locale data which is available
- * directly in the program as a constant.
- */
+/// Test date formatting and parsing using locale data which is available
+/// directly in the program as a constant.
 
 library date_time_format_test;
 
 import 'dart:async';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 import 'package:intl/intl.dart';
 import 'date_time_format_test_core.dart';
 
 typedef List<String> TestListFunc();
 
 typedef Future InitializeDateFormattingFunc(String locale, String filePath);
 
-/**
- * Return only the odd-numbered locales. A simple way to divide the list into
- * two roughly equal parts.
- */
+/// Return only the odd-numbered locales. A simple way to divide the list into
+/// two roughly equal parts.
 List<String> oddLocales() {
   int i = 1;
   return allLocales().where((x) => (i++).isOdd).toList();
 }
 
-/**
- * Return a set of a few locales to run just the tests on a small sample.
- */
-List smallSetOfLocales() {
+/// Return a set of a few locales to run just the tests on a small sample.
+List<String> smallSetOfLocales() {
   return allLocales().sublist(0, 10);
 }
 
-/**
- * Return only the even-numbered locales. A simple way to divide the list into
- * two roughly equal parts.
- */
+/// Return only the even-numbered locales. A simple way to divide the list into
+/// two roughly equal parts.
 List<String> evenLocales() {
   int i = 1;
   return allLocales().where((x) => !((i++).isOdd)).toList();
 }
 
 void runWith(TestListFunc getSubset, String dir,
     InitializeDateFormattingFunc initFunction) {
   // Initialize one locale just so we know what the list is.
   // Also, note that we take the list of locales as a function so that we don't
   // evaluate it until after we know that all the locales are available.
 
   bool initialized = false;
 
   setUp(() {
     if (initialized) {
       return null;
     }
     return initFunction("en_US", dir).then((_) {
       return Future.forEach(DateFormat.allLocalesWithSymbols(), (locale) {
         return initFunction(locale, dir);
       });
     }).then((_) {
       initialized = true;
     });
   });
 
   runDateTests(getSubset);
 }