Reapply "Rename mappedBy to map."

pkg/intl/test/date_time_format_local_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.
  */
 
 library date_time_format_test;
 
 import 'dart:async';
 import 'package:intl/intl.dart';
 import 'package:intl/date_time_patterns.dart';
 import 'package:intl/date_symbol_data_local.dart';
 import 'date_time_format_test_core.dart';
 
 runWith([Function getSubset]) {
   // 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.
   initializeDateFormatting("en_US",null).then(
       (_) => runEverything(getSubset));
 }
 
 void runEverything(Function getSubset) {
   // Initialize all locales and wait for them to finish before running tests.
   var futures = DateFormat.allLocalesWithSymbols()
-      .mappedBy((locale) => initializeDateFormatting(locale, null))
+      .map((locale) => initializeDateFormatting(locale, null))
       .toList();
   Future.wait(futures).then((results) => runDateTests(getSubset()));
 }