Move the status file parser into its own package.

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
  *   and creating [TestCase]s for those files that meet the relevant criteria.
  * - Preparing tests, including copying files and frameworks to temporary
  *   directories, and computing the command line and arguments to be run.
  */
 import 'dart:async';
 import 'dart:io';
 
+import "package:status_file/expectation.dart";
+
 import 'browser_test.dart';
 import 'command.dart';
 import 'compiler_configuration.dart';
 import 'configuration.dart';
-import 'expectation.dart';
 import 'expectation_set.dart';
 import 'html_test.dart' as html_test;
 import 'http_server.dart';
 import 'multitest.dart';
 import 'path.dart';
 import 'runtime_updater.dart';
 import 'summary_report.dart';
 import 'test_configurations.dart';
 import 'test_runner.dart';
 import 'utils.dart';
@@ skipping 1660 matching lines @@
 
   bool isTestFile(String filename) {
     // NOTE: We exclude tests and patch files for now.
     return filename.endsWith(".dart") &&
         !filename.endsWith("_test.dart") &&
         !filename.contains("_internal/js_runtime/lib");
   }
 
   bool get listRecursively => true;
 }