Adapt streams for additional stackTrace argument.

tests/lib/async/stack_trace21_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 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'dart:async';
 
 StackTrace captureStackTrace() {
   try {
     throw 0;
   } catch (e, st) {
     return st;
   }
 }
 
 main() {
   StackTrace trace = captureStackTrace();
+  var controller;
+  controller = new StreamController(onListen: () {
+    controller.addError("error", trace);
+    controller.close();
+  });
   asyncStart();
-  var f = new Future(() => 499);
-  f.then((_) => new Future.error("e", trace))
-    .then((_) { throw "Unreachable"; },
+  controller.stream
+    .listen((_) { throw "should never be reached"; },
       onError: (e, st) {
-        Expect.equals("e", e);
+        Expect.equals("error", e);
         Expect.identical(trace, st);
+      },
+      onDone: () {
         asyncEnd();
       });
 }