Converted Observatory class-tree element

runtime/observatory/lib/src/repositories/class.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 repositories;
+
+class ClassRepository extends M.ClassRepository {
+  final S.Isolate isolate;
+
+  ClassRepository(this.isolate);
+
+  Future<M.Class> getObject() {
+    return isolate.getClassHierarchy();
+  }
+  Future<M.Class> get(String id) async {
+    return (await isolate.getObject(id)) as S.Class;
+  }
+}