Support shelf 0.7.0.

lib/src/runner/browser/iframe_test.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 'package:stream_channel/stream_channel.dart';
+
 import '../../backend/group.dart';
 import '../../backend/live_test.dart';
 import '../../backend/live_test_controller.dart';
 import '../../backend/metadata.dart';
 import '../../backend/operating_system.dart';
 import '../../backend/state.dart';
 import '../../backend/suite.dart';
 import '../../backend/test.dart';
 import '../../backend/test_platform.dart';
 import '../../utils.dart';
-import '../../util/multi_channel.dart';
 import '../../util/remote_exception.dart';
 import '../../util/stack_trace_mapper.dart';
 
 /// A test in a running iframe.
 class IframeTest extends Test {
   final String name;
   final Metadata metadata;
 
   /// The mapper used to map stack traces for errors coming from this test, or
   /// `null`.
@@ skipping 61 matching lines @@
     return controller.liveTest;
   }
 
   Test forPlatform(TestPlatform platform, {OperatingSystem os}) {
     if (!metadata.testOn.evaluate(platform, os: os)) return null;
     return new IframeTest(
         name, metadata.forPlatform(platform, os: os), _channel,
         mapper: _mapper);
   }
 }