Refactor VM service IDs

runtime/bin/vmservice/client/lib/src/observatory_elements/service_ref.dart

+// Copyright (c) 2013, 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 service_ref_element;
+
+import 'package:polymer/polymer.dart';
+import 'observatory_element.dart';
+
+@CustomTag('service-ref')
+class ServiceRefElement extends ObservatoryElement {
+  @published Map ref;
+  @published bool internal = false;
+  ServiceRefElement.created() : super.created();
+
+  void refChanged(oldValue) {
+    notifyPropertyChange(#url, "", url);
+    notifyPropertyChange(#name, [], name);
+  }
+
+  String get url {
+    if ((app != null) && (ref != null)) {
+      return app.locationManager.currentIsolateRelativeLink(ref['id']);
+    }
+    return '';
+  }
+
+  String get name {
+    if (ref == null) {
+      return '';
+    }
+    String name_key = internal ? 'name' : 'user_name';
+    if (ref[name_key] != null) {
+      return ref[name_key];
+    }
+    return '';
+  }
+}