Change hasSubscribers to hasListener.

runtime/bin/socket_patch.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.
 
 patch class RawServerSocket  {
   /* patch */ static Future<RawServerSocket> bind([String address = "127.0.0.1",
                                                    int port = 0,
                                                    int backlog = 0]) {
     return _RawServerSocket.bind(address, port, backlog);
   }
@@ skipping 453 matching lines @@
 
   void _pause() {
     _socket.setListening(read: false, write: false);
   }
 
   void _resume() {
     _socket.setListening(read: true, write: false);
   }
 
   void _onSubscriptionStateChange() {
-    if (_controller.hasSubscribers) {
+    if (_controller.hasListener) {
       _resume();
     } else {
       close();
     }
   }
   void _onPauseStateChange() {
     if (_controller.isPaused) {
       _pause();
     } else {
       _resume();
@@ skipping 106 matching lines @@
 
   void _onPauseStateChange() {
     if (_controller.isPaused) {
       _pause();
     } else {
       _resume();
     }
   }
 
   void _onSubscriptionStateChange() {
-    if (_controller.hasSubscribers) {
+    if (_controller.hasListener) {
       _resume();
     } else {
       close();
     }
   }
 }
 
 
 patch class ServerSocket {
   /* patch */ static Future<ServerSocket> bind([String address = "127.0.0.1",
@@ skipping 248 matching lines @@
   }
 
   _closeRawSocket() {
     var tmp = _raw;
     _raw = null;
     _closed = true;
     tmp.close();
   }
 
   void _onSubscriptionStateChange() {
-    if (_controller.hasSubscribers) {
+    if (_controller.hasListener) {
       _ensureRawSocketSubscription();
       // Enable read events for providing data to subscription.
       if (_raw != null) {
         _raw.readEventsEnabled = true;
       }
     } else {
       _controllerClosed = true;
       if (_raw != null) {
         _raw.shutdown(SocketDirection.RECEIVE);
       }
@@ skipping 92 matching lines @@
     _raw.onBadCertificate = callback;
   }
 
   X509Certificate get peerCertificate {
     if (_raw == null) {
      throw new StateError("peerCertificate called on destroyed SecureSocket");
     }
     return _raw.peerCertificate;
   }
 }