Converted observatory flag-list element

runtime/observatory/lib/src/repositories/flag.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 Flag implements M.Flag {
+  final String name;
+  final String comment;
+  final bool modified;
+  final String valueAsString;
+  Flag(this.name, this.comment, this.modified, this.valueAsString) {
+    assert(name != null);
+    assert(comment != null);
+    assert(modified != null);
+  }
+}
+
+class FlagsRepository implements M.FlagsRepository {
+  Future<Iterable<Flag>> list(M.VM vm) async{
+    if (vm is S.VM) {
+      List<Map> flags = ((await vm.getFlagList()) as S.ServiceMap)['flags'];
+      return flags.map(_toFlag);
+    }
+    return const [];
+  }
+
+  static _toFlag(Map map){
+    return new Flag(map['name'],
+                    map['comment'],
+                    map['modified'],
+                    map['valueAsString']);
+  }
+}