Converted Observatory class-tree element

runtime/observatory/tests/observatory_ui/mocks/objects/isolate.dart

 // Copyright (c) 2016, 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 mocks;
 
 class IsolateRefMock implements M.IsolateRef {
   final String id;
   final int number;
   final String name;
 
-  const IsolateRefMock({this.id, this.number, this.name});
+  const IsolateRefMock({this.id: 'i-id', this.number, this.name: 'i-name'});
 }
 
 class IsolateMock implements M.Isolate {
   final String id;
   final int number;
   final String name;
   final DateTime startTime;
   final bool runnable;
 
-  const IsolateMock({this.id, this.number, this.name, this.startTime,
-      this.runnable});
+  const IsolateMock({this.id: 'i-id', this.number, this.name: 'i-name',
+                     this.startTime, this.runnable: true});
   // TODO(cbernaschina) add other properties.
 }