Remove explicit delayed futures in dart:io.

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(address,
                                                   int port,
                                                   {int backlog: 0,
                                                    bool v6Only: false}) {
     return _RawServerSocket.bind(address, port, backlog, v6Only);
@@ skipping 849 matching lines @@
       }
     } catch (e) {
       stop();
       socket._consumerDone();
       done(e);
     }
   }
 
   void done([error]) {
     if (streamCompleter != null) {
-      var tmp = streamCompleter;
+      if (error != null) {
+        streamCompleter.completeError(error);
+      } else {
+        streamCompleter.complete(socket);
+      }
       streamCompleter = null;
-      if (error != null) {
-        tmp.completeError(error);
-      } else {
-        tmp.complete(socket);
-      }
     }
   }
 
   void stop() {
     if (subscription == null) return;
     subscription.cancel();
     subscription = null;
     socket._disableWriteEvent();
   }
 }
@@ skipping 208 matching lines @@
     _raw.onBadCertificate = callback;
   }
 
   X509Certificate get peerCertificate {
     if (_raw == null) {
      throw new StateError("peerCertificate called on destroyed SecureSocket");
     }
     return _raw.peerCertificate;
   }
 }