Support tag configuration.

lib/src/runner/configuration/args.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:io';
 
 import 'package:args/args.dart';
 
 import '../../frontend/timeout.dart';
 import '../../backend/test_platform.dart';
@@ skipping 138 matching lines @@
       color: ifParsed('color'),
       packageRoot: ifParsed('package-root'),
       reporter: ifParsed('reporter'),
       pubServePort: _wrapFormatException(options, 'pub-serve', int.parse),
       concurrency: _wrapFormatException(options, 'concurrency', int.parse),
       timeout: _wrapFormatException(options, 'timeout',
           (value) => new Timeout.parse(value)),
       pattern: pattern,
       platforms: ifParsed('platform')?.map(TestPlatform.find),
       paths: options.rest.isEmpty ? null : options.rest,
-      tags: tags,
+      includeTags: tags,
       excludeTags: excludeTags);
 }
 
 /// Runs [parse] on the value of the option [name], and wraps any
 /// [FormatException] it throws with additional information.
 _wrapFormatException(ArgResults options, String name, parse(value)) {
   if (!options.wasParsed(name)) return null;
 
   var value = options[name];
   if (value == null) return null;
 
   try {
     return parse(value);
   } on FormatException catch (error) {
     throw new FormatException('Couldn\'t parse --$name "${options[name]}": '
         '${error.message}');
   }
 }