Remove streamSpawnUri and mangler.

tests/isolate/message_stream2_test.dart

Index: tests/isolate/message_stream2_test.dart
diff --git a/tests/isolate/message2_test.dart b/tests/isolate/message_stream2_test.dart
similarity index 75%
copy from tests/isolate/message2_test.dart
copy to tests/isolate/message_stream2_test.dart
index 07b34e6716bc020ba7722c64d7a05b96ec98626e..c9a6a6702c240987883651f4a7847625f0398764 100644
--- a/tests/isolate/message2_test.dart
+++ b/tests/isolate/message_stream2_test.dart
@@ -42,28 +42,35 @@ class MessageTest {
 }
 
 void pingPong() {
-  port.receive((var message, SendPort replyTo) {
-    if (message == -1) {
-      port.close();
-    } else {
-      // Bounce the received object back so that the sender
-      // can make sure that the object matches.
-      replyTo.send(message, null);
+  bool isFirst = true;
+  IsolateSink replyTo;
+  stream.listen((var message) {
+    if (isFirst) {
+      isFirst = false;
+      replyTo = message;
+      return;
     }
+    // Bounce the received object back so that the sender
+    // can make sure that the object matches.
+    replyTo.add(message);
   });
 }
 
 main() {
   test("map is equal after it is sent back and forth", () {
-    SendPort remote = spawnFunction(pingPong);
+    IsolateSink remote = streamSpawnFunction(pingPong);
     Map m = new Map();
     m[1] = "eins";
     m[2] = "deux";
     m[3] = "tre";
     m[4] = "four";
-    remote.call(m).then(expectAsync1((var received) {
+    MessageBox box = new MessageBox();
+    remote.add(box.sink);
+    remote.add(m);
+    box.stream.listen(expectAsync1((var received) {
       MessageTest.mapEqualsDeep(m, received);
-      remote.send(-1, null);
+      remote.close();
+      box.stream.close();
     }));
   });
 }