When attempting to navigate to a page for an isolate that doesn't exist, offer to

runtime/observatory/lib/src/elements/isolate_reconnect.dart

+// Copyright (c) 2014, 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 isolate_reconnect_element;
+
+import 'dart:html';
+import 'package:polymer/polymer.dart';
+import 'observatory_element.dart';
+import 'package:observatory/app.dart';
+import 'package:observatory/service_html.dart';
+
+@CustomTag('isolate-reconnect')
+class IsolateReconnectElement extends ObservatoryElement {
+  IsolateReconnectElement.created() : super.created();
+
+  get missingIsolateId {
+    return app.locationManager.uri.queryParameters['originalIsolateId'];
+  }
+
+  linkToContinueIn(isolate) {
+    var parameters = new Map.from(app.locationManager.uri.queryParameters);
+    parameters['isolateId'] = isolate.id;
+    parameters.remove('originalIsolateId');
+    var path = parameters.remove('originalPath');
+    path = "/$path";
+    var generatedUri = new Uri(path: path, queryParameters: parameters);
+    return app.locationManager.makeLink(generatedUri.toString());
+  }
+}