cleanup to tools/testing/dart

tests/standalone/io/test_runner_test.dart

 // Copyright (c) 2013, 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 "dart:isolate";
 import "dart:async";
+
 import "../../../tools/testing/dart/test_runner.dart";
 import "../../../tools/testing/dart/test_suite.dart";
-import "../../../tools/testing/dart/test_progress.dart" as progress;
-import "../../../tools/testing/dart/status_file_parser.dart";
+import '../../../tools/testing/dart/lib/command.dart';
+import "../../../tools/testing/dart/lib/test_case.dart";
+import "../../../tools/testing/dart/lib/test_progress.dart" as progress;
+import "../../../tools/testing/dart/lib/status_file_parser.dart";
 import "../../../tools/testing/dart/test_options.dart";
 import "process_test_util.dart";
 
 final DEFAULT_TIMEOUT = 10;
 final LONG_TIMEOUT = 30;
 
 class TestController {
   static int numTests = 0;
   static int numCompletedTests = 0;
 
@@ skipping 121 matching lines @@
         break;
       case 'timeout':
         // This process should be killed by the test after DEFAULT_TIMEOUT
         new Timer(new Duration(hours: 42), (){ });
         break;
       default:
         throw "Unknown option ${arguments[0]} passed to test_runner_test";
     }
   }
 }