Refactor Future constructors.

pkg/scheduled_test/lib/scheduled_process.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 scheduled_test.scheduled_process;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'scheduled_test.dart';
@@ skipping 116 matching lines @@
 
     _process = new ValueFuture(schedule(() {
       if (!_endScheduled) {
         throw new StateError("Scheduled process '$description' must "
             "have shouldExit() or kill() called before the test is run.");
       }
 
       _handleExit(exitCodeCompleter);
 
       return Future.wait([
-        new Future.of(() => executable),
+        new Future.sync(() => executable),
         awaitObject(arguments),
-        new Future.of(() => options)
+        new Future.sync(() => options)
       ]).then((results) {
         executable = results[0];
         arguments = results[1];
         options = results[2];
         _updateDescription(executable, arguments);
         return Process.start(executable, arguments, options).then((process) {
           // TODO(nweiz): enable this when issue 9020 is fixed.
           // process.stdin.encoding = Encoding.UTF_8;
           return process;
         });
@@ skipping 155 matching lines @@
     schedule(() {
       _endExpected = true;
       return _exitCode.then((exitCode) {
         if (expectedExitCode != null) {
           expect(exitCode, equals(expectedExitCode));
         }
       });
     }, "waiting for process '$description' to exit");
   }
 }