Remove prints.

tests/isolate/src/PromiseBasedTest.dart

Index: tests/isolate/src/PromiseBasedTest.dart
===================================================================
--- tests/isolate/src/PromiseBasedTest.dart	(revision 427)
+++ tests/isolate/src/PromiseBasedTest.dart	(working copy)
@@ -12,15 +12,15 @@
   void main() {
     int seed = 0;
     this.port.receive((var message, SendPort replyTo) {
-      print("Got ${message[0]}");
+      //print("Got ${message[0]}");
       if (seed == 0) {
         seed = message[0];
       } else {
         Promise<int> response = new Promise<int>();
         var proxy = new Proxy.forPort(replyTo);
-        print("send to proxy");
+        //print("send to proxy");
         proxy.send([response]);
-        print("sent");
+        //print("sent");
         response.complete(seed + message[0]);
         this.port.close();
       }
@@ -34,12 +34,12 @@
   proxy.send([42]);  // Seed the isolate.
   Promise<int> result = new PromiseProxy<int>(proxy.call([87]));
   Promise promise = expect.completes(result).then((int value) {
-    print("expect 1: $value");
+    //print("expect 1: $value");
     Expect.equals(42 + 87, value);
     return 99;
   });
   expect.completes(promise).then((int value) {
-    print("expect 2: $value");
+    //print("expect 2: $value");
     Expect.equals(99, value);
     expect.succeeded();
   });
@@ -52,20 +52,20 @@
   Promise<int> result = new Promise<int>();
   ReceivePort completer = new ReceivePort.singleShot();
   completer.receive((var msg, SendPort _) {
-    print("test completer");
+    //print("test completer");
     result.complete(msg[0]);
   });
   sendCompleter.addCompleteHandler((SendPort port) {
-    print("test send");
+    //print("test send");
     port.send([completer.toSendPort()], null);
   });
   Promise promise = expect.completes(result).then((int value) {
-    print("expect 1: $value");
+    //print("expect 1: $value");
     Expect.equals(42 + 87, value);
     return 99;
   });
   expect.completes(promise).then((int value) {
-    print("expect 2: $value");
+    //print("expect 2: $value");
     Expect.equals(99, value);
     expect.succeeded();
   });