Update Timer API to take the callback as the last parameter.

samples/actors/core/actors-term.dart

Index: samples/actors/core/actors-term.dart
diff --git a/samples/actors/core/actors-term.dart b/samples/actors/core/actors-term.dart
index 50d6fd66d1133130e14ac32f6ddf0552316d7073..3cdda0d977ec5fd7381602d98e2c04b3137199ab 100644
--- a/samples/actors/core/actors-term.dart
+++ b/samples/actors/core/actors-term.dart
@@ -14,7 +14,7 @@ class _WindowActor extends Actor {
      * of milliseconds specified by 'timeout' parameter.
      */
     on["setTimeout"] = (Reply reply, int timeout) {
-      new Timer((Timer t) {reply.respond();}, timeout);
+      new Timer(timeout, (Timer t) {reply.respond();});
     };
   }
 }