Remove explicit delayed futures in dart:io.

sdk/lib/io/websocket_impl.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.
 
 part of dart.io;
 
 const String _webSocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 
 class _WebSocketMessageType {
   static const int NONE = 0;
@@ skipping 567 matching lines @@
               },
               onError: (error) {
                 if (!_done(error)) {
                   _closeCompleter.completeError(error);
                 }
               });
   }
 
   bool _done([error]) {
     if (_completer == null) return false;
-    var tmp = _completer;
+    if (error != null) {
+      _completer.completeError(error);
+    } else {
+      _completer.complete(webSocket);
+    }
     _completer = null;
-    if (error != null) {
-      tmp.completeError(error);
-    } else {
-      tmp.complete(webSocket);
-    }
     return true;
   }
 
   Future addStream(var stream) {
     _ensureController();
     _completer = new Completer();
     _subscription = stream.listen(
         (data) {
           _controller.add(data);
         },
@@ skipping 191 matching lines @@
            (code < WebSocketStatus.NORMAL_CLOSURE ||
             code == WebSocketStatus.RESERVED_1004 ||
             code == WebSocketStatus.NO_STATUS_RECEIVED ||
             code == WebSocketStatus.ABNORMAL_CLOSURE ||
             (code > WebSocketStatus.INTERNAL_SERVER_ERROR &&
              code < WebSocketStatus.RESERVED_1015) ||
             (code >= WebSocketStatus.RESERVED_1015 &&
              code < 3000));
   }
 }