Converted Observatory class-view element

runtime/observatory/lib/src/repositories/strongly_reachable_instances.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 StronglyReachableInstancesRepository
+    implements M.StronglyReachableInstancesRepository {
+  Future<M.InstanceSet> get(M.IsolateRef i, M.ClassRef c,
+                                           {int limit: 100}) async {
+    S.Isolate isolate = i as S.Isolate;
+    S.Class cls = c as S.Class;
+    assert(isolate != null);
+    assert(cls != null);
+    assert(limit != null);
+    return (await isolate.getInstances(cls, limit))
+        as S.InstanceSet;
+  }
+}