Support shelf 0.7.0.

test/runner/browser/code_server.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:async';
-import 'dart:io';
 
+import 'package:http_parser/http_parser.dart';
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf_web_socket/shelf_web_socket.dart';
 import 'package:scheduled_test/scheduled_server.dart';
 
 /// A class that schedules a server to serve Dart and/or JS code and receive
 /// WebSocket connections.
 ///
 /// This uses [ScheduledServer] under the hood, and has similar semantics: its
 /// `handle*` methods all schedule a handler that must be hit before the
 /// schedule will continue.
@@ skipping 54 matching lines @@
     });
 
     _server.handle("GET", "/index.js", (_) {
       return new shelf.Response.ok(javaScript,
           headers: {'content-type': 'application/javascript'});
     });
   }
 
   /// Handles a WebSocket connection to the root of the server, and returns a
   /// future that will complete to the WebSocket.
-  Future<WebSocket> handleWebSocket() {
+  Future<WebSocketChannel> handleWebSocket() {
     var completer = new Completer();
     _server.handle("GET", "/", webSocketHandler(completer.complete));
     return completer.future;
   }
 }