Rework Timer interface.

sdk/lib/_internal/compiler/implementation/lib/mirrors_patch.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.
 
 // Patch library for dart:mirrors.
 
 import 'dart:_foreign_helper' show JS;
 
 // Yeah, seriously: mirrors in dart2js are experimental...
 const String _MIRROR_OPT_IN_MESSAGE = """
@@ skipping 64 matching lines @@
       throw new UnsupportedError('Named arguments are not implemented');
     }
     // Copy the list to ensure that it can safely be passed to
     // JavaScript.
     var jsList = new List.from(positionalArguments);
     var mangledName = '${memberName}\$${positionalArguments.length}';
     var method = JS('var', '#[#]', reflectee, mangledName);
     var completer = new Completer<InstanceMirror>();
     // TODO(ahe): [Completer] or [Future] should have API to create a
     // delayed action.  Simulating with a [Timer].
-    new Timer(0, (timer) {
+    Timer.run(() {
       if (JS('String', 'typeof #', method) == 'function') {
         var result =
             JS('var', '#.apply(#, #)', method, reflectee, jsList);
         completer.complete(new _InstanceMirror(result));
       } else {
         completer.completeError('not a method $memberName');
       }
     });
     return completer.future;
   }
 
   String toString() => 'InstanceMirror($reflectee)';
 }
 
 class _ClassMirror extends ClassMirror {
   final String _name;
   final _jsConstructor;
 
   _ClassMirror(this._name, this._jsConstructor) {
     _ensureEnabled();
   }
 
   String toString() => 'ClassMirror($_name)';
 }
 
 _ensureEnabled() {
   if (_mirrorsEnabled) return;
   throw new UnsupportedError('dart:mirrors is an experimental feature');
 }