Remove uses of Options from utils directory.

utils/tests/testrunner/testrunner_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.
 
 library testrunner_test;
 
 import 'dart:async';
 import 'dart:io';
 import 'package:unittest/unittest.dart';
 
@@ skipping 85 matching lines @@
     }
   });
   return rtn;
 }
 
 // A useful function to quickly disable a group of tests; just
 // replace group() with skip_group().
 skip_group(_1,_2) {}
 
 main() {
-  var opt = new Options();
-  dart = opt.executable;
+  dart = Platform.executable;
   var idx = dart.indexOf('dart-sdk');
   if (idx < 0) {
     print("Please run using the dart executable from the Dart SDK");
     exit(-1);
   }
   var _ = Platform.pathSeparator;
   var testrunner = '../../testrunner/testrunner.dart'
           .replaceAll('/', Platform.pathSeparator);
 
   group("list tests", () {
@@ skipping 395 matching lines @@
           '--server',
           '--port=3456',
           '--root=${Directory.current.path}',
           'http_client_tests' ],
         [ '?PASS .*/http_client_tests/http_client_test.dart  test1',
           '?PASS .*/http_client_tests/http_client_test.dart  test2' ]);
     });
   });
 }