Converted Observatory persistent-hangles-page element

runtime/observatory/lib/elements.dart

Index: runtime/observatory/lib/elements.dart
diff --git a/runtime/observatory/lib/elements.dart b/runtime/observatory/lib/elements.dart
index efd2cb051115cf4ee6dd2c7e995fa00d365ce65b..4c8b6f3eca5ed340002a2408b19582f43fa2b2d3 100644
--- a/runtime/observatory/lib/elements.dart
+++ b/runtime/observatory/lib/elements.dart
@@ -26,7 +26,6 @@ export 'package:observatory/src/elements/object_view.dart';
 export 'package:observatory/src/elements/objectpool_view.dart';
 export 'package:observatory/src/elements/objectstore_view.dart';
 export 'package:observatory/src/elements/observatory_element.dart';
-export 'package:observatory/src/elements/persistent_handles.dart';
 export 'package:observatory/src/elements/script_inset.dart';
 export 'package:observatory/src/elements/script_view.dart';
 export 'package:observatory/src/elements/service_ref.dart';
@@ -101,6 +100,7 @@ import 'package:observatory/src/elements/objectpool_ref.dart';
 import 'package:observatory/src/elements/object_common.dart';
 import 'package:observatory/src/elements/object_common_wrapper.dart';
 import 'package:observatory/src/elements/observatory_application.dart';
+import 'package:observatory/src/elements/persistent_handles.dart';
 import 'package:observatory/src/elements/pc_descriptors_ref.dart';
 import 'package:observatory/src/elements/ports.dart';
 import 'package:observatory/src/elements/sample_buffer_control.dart';
@@ -161,6 +161,7 @@ export 'package:observatory/src/elements/nav/vm_menu.dart';
 export 'package:observatory/src/elements/objectpool_ref.dart';
 export 'package:observatory/src/elements/object_common.dart';
 export 'package:observatory/src/elements/observatory_application.dart';
+export 'package:observatory/src/elements/persistent_handles.dart';
 export 'package:observatory/src/elements/pc_descriptors_ref.dart';
 export 'package:observatory/src/elements/ports.dart';
 export 'package:observatory/src/elements/sample_buffer_control.dart';
@@ -239,6 +240,7 @@ Future initElements() async {
   ObjectCommonElementWrapper.tag.ensureRegistration();
   ObjectPoolRefElement.tag.ensureRegistration();
   ObservatoryApplicationElement.tag.ensureRegistration();
+  PersistentHandlesPageElement.tag.ensureRegistration();
   PcDescriptorsRefElement.tag.ensureRegistration();
   PortsElement.tag.ensureRegistration();
   ScriptRefElement.tag.ensureRegistration();