Fix --pause-after-load with a pattern.

lib/src/backend/suite.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.
 
 library test.backend.suite;
 
 import 'dart:async';
 import 'dart:collection';
 
 import '../util/async_thunk.dart';
@@ skipping 78 matching lines @@
   }
 
   /// Returns a new suite with the given fields updated.
   ///
   /// In the new suite, [metadata] and [tests] will be filtered according to
   /// [platform] and [os].
   Suite change({String path, Metadata metadata, Iterable<Test> tests}) {
     if (path == null) path = this.path;
     if (metadata == null) metadata = this.metadata;
     if (tests == null) tests = this.tests;
-    return new Suite(tests, path: path, metadata: metadata,
-        onClose: this.close);
+    return new Suite(tests, platform: platform, os: os, path: path,
+        metadata: metadata, onClose: this.close);
   }
 
   /// Closes the suite and releases any resources associated with it.
   Future close() {
     return _closeThunk.run(() async {
       if (_onClose != null) await _onClose();
     });
   }
 }