Remove StreamController.broadcast.

tests/lib/async/stream_state_test.dart

 // Copyright (c) 2013, 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.
 
 // Test the event/callback protocol of the stream implementations.
 library stream_state_test;
 
 import "../../../pkg/unittest/lib/unittest.dart";
 import "stream_state_helper.dart";
 
 const ms5 = const Duration(milliseconds: 5);
 
 main() {
   mainTest(false);
-  mainTest(true);
+  // TODO(floitsch): reenable?
+  // mainTest(true);
 }
 
 mainTest(bool broadcast) {
   var p = broadcast ? "BC" : "SC";
   test("$p-sub-data-done", () {
     var t = new StreamProtocolTest(broadcast);
     t..expectSubscription(true, false)
      ..expectData(42)
      ..expectDone()
      ..expectSubscription(false, false);
@@ skipping 108 matching lines @@
     var t = new StreamProtocolTest(broadcast);
     t..expectSubscription(true, false)
      ..expectDone()
      ..expectSubscription(false, false)
      ..expectDone();
     t..subscribe()
      ..close()
      ..subscribe();  // Subscribe after done does not cause callbacks at all.
   });
 }