Redo StreamTransformers so they work with Stack traces.

tests/lib/async/catch_errors17_test.dart

Index: tests/lib/async/catch_errors17_test.dart
diff --git a/tests/lib/async/catch_errors17_test.dart b/tests/lib/async/catch_errors17_test.dart
index 4a1591f59d559790f91f5a8075d3ee9aa57656c2..b57173240df4328a7dd95092589a889b118c0849 100644
--- a/tests/lib/async/catch_errors17_test.dart
+++ b/tests/lib/async/catch_errors17_test.dart
@@ -22,8 +22,8 @@ main() {
           events.add("map $x");
           return x + 100;
         })
-        .transform(new StreamTransformer(
-            handleError: (e, sink) => sink.add("error $e")))
+        .transform(new StreamTransformer.fromHandlers(
+            handleError: (e, st, sink) { sink.add("error $e"); }))
         .listen((x) { events.add("stream $x"); });
     }).listen((x) { events.add(x); });
     controller.add(1);