Implement getRange (returning an Iterable).

tools/testing/dart/test_runner.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 executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 376 matching lines @@
     : super(displayName, commands, configuration, completedHandler,
         expectedOutcomes, isNegative: isNegative, info: info) {
     numRetries = 2; // Allow two retries to compensate for flaky browser tests.
     observers = [];
   }
 
   List<String> get _lastArguments => commands.last.arguments;
 
   List<String> get batchRunnerArguments => [_lastArguments[0], '--batch'];
 
-  List<String> get batchTestArguments =>
-      _lastArguments.getRange(1, _lastArguments.length - 1);
+  List<String> get batchTestArguments => _lastArguments.sublist(1);
 
   /** Add a test case to listen for when this current test has completed. */
   void addObserver(BrowserTestCase testCase) {
     observers.add(testCase);
   }
 
   /**
    * Notify all of the test cases that are dependent on this one that they can
    * proceed.
    */
@@ skipping 1314 matching lines @@
     }
   }
 
   void eventAllTestsDone() {
     for (var listener in _eventListener) {
       listener.allDone();
     }
   }
 }