Rework Timer interface.

tests/lib/async/future_test.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.
 
 library future_test;
 
 import 'dart:async';
 import 'dart:isolate';
 
+const Duration MS = const Duration(milliseconds: 1);
+
 testImmediate() {
   final future = new Future<String>.immediate("42");
   var port = new ReceivePort();
   future.then((x) {
     Expect.equals("42", x);
     port.close();
   });
 }
 
 testOf() {
@@ skipping 330 matching lines @@
 
 testFutureWhenCompletePreValue() {
   var port = new ReceivePort();
   int counter = 2;
   countDown() {
     if (--counter == 0) port.close();
   }
   var completer = new Completer();
   Future future = completer.future;
   completer.complete(42);
-  new Timer(0, () {
+  Timer.run(() {
     Future later = future.whenComplete(countDown);
     later.then((v) {
       Expect.equals(42, v);
       countDown();
     });
   });
 }
 
 testFutureWhenValueFutureValue() {
+
   var port = new ReceivePort();
   int counter = 3;
   countDown(int expect) {
     Expect.equals(expect, counter);
     if (--counter == 0) port.close();
   }
   var completer = new Completer();
   completer.future.whenComplete(() {
     countDown(3);
     var completer2 = new Completer();
-    new Timer(10, (_) {
+    new Timer(MS * 10, () {
       countDown(2);
       completer2.complete(37);
     });
     return completer2.future;
   }).then((v) {
     Expect.equals(42, v);
     countDown(1);
   });
 
   completer.complete(42);
 }
 
 testFutureWhenValueFutureError() {
   var port = new ReceivePort();
   int counter = 3;
   countDown(int expect) {
     Expect.equals(expect, counter);
     if (--counter == 0) port.close();
   }
   var completer = new Completer();
   completer.future.whenComplete(() {
     countDown(3);
     var completer2 = new Completer();
-    new Timer(10, (_) {
+    new Timer(MS * 10, () {
       countDown(2);
       completer2.completeError("Fail");
     });
     return completer2.future;
   }).then((v) {
     Expect.fail("should fail async");
   }, onError: (AsyncError e) {
     Expect.equals("Fail", e.error);
     countDown(1);
   });
 
   completer.complete(42);
 }
 
 testFutureWhenErrorFutureValue() {
   var port = new ReceivePort();
   int counter = 3;
   countDown(int expect) {
     Expect.equals(expect, counter);
     if (--counter == 0) port.close();
   }
   var completer = new Completer();
   completer.future.whenComplete(() {
     countDown(3);
     var completer2 = new Completer();
-    new Timer(10, (_) {
+    new Timer(MS * 10, () {
       countDown(2);
       completer2.complete(37);
     });
     return completer2.future;
   }).then((v) {
     Expect.fail("should fail async");
   }, onError: (AsyncError e) {
     Expect.equals("Error", e.error);
     countDown(1);
   });
 
   completer.completeError("Error");
 }
 
 testFutureWhenErrorFutureError() {
   var port = new ReceivePort();
   int counter = 3;
   countDown(int expect) {
     Expect.equals(expect, counter);
     if (--counter == 0) port.close();
   }
   var completer = new Completer();
   completer.future.whenComplete(() {
     countDown(3);
     var completer2 = new Completer();
-    new Timer(10, (_) {
+    new Timer(MS * 10, () {
       countDown(2);
       completer2.completeError("Fail");
     });
     return completer2.future;
   }).then((v) {
     Expect.fail("should fail async");
   }, onError: (AsyncError e) {
     Expect.equals("Fail", e.error);
     countDown(1);
   });
@@ skipping 152 matching lines @@
   testFutureCatchThrowsAsync();
   testFutureWhenThrowsAsync();
   testFutureCatchRethrowsAsync();
 
   testChainedFutureValue();
   testChainedFutureValueDelay();
   testChainedFutureError();
 }