Wrapping leaf nodes in non polymer elements

runtime/observatory/lib/elements.dart

 library observatory_elements;
 
 // Export elements.
 export 'package:observatory/src/elements/action_link.dart';
 export 'package:observatory/src/elements/class_ref.dart';
 export 'package:observatory/src/elements/class_tree.dart';
 export 'package:observatory/src/elements/class_view.dart';
 export 'package:observatory/src/elements/code_ref.dart';
 export 'package:observatory/src/elements/code_view.dart';
 export 'package:observatory/src/elements/context_ref.dart';
 export 'package:observatory/src/elements/context_view.dart';
 export 'package:observatory/src/elements/cpu_profile.dart';
-export 'package:observatory/src/elements/curly_block.dart';
 export 'package:observatory/src/elements/debugger.dart';
 export 'package:observatory/src/elements/error_view.dart';
 export 'package:observatory/src/elements/eval_box.dart';
 export 'package:observatory/src/elements/eval_link.dart';
 export 'package:observatory/src/elements/field_ref.dart';
 export 'package:observatory/src/elements/field_view.dart';
 export 'package:observatory/src/elements/flag_list.dart';
 export 'package:observatory/src/elements/function_ref.dart';
 export 'package:observatory/src/elements/function_view.dart';
 export 'package:observatory/src/elements/general_error.dart';
 export 'package:observatory/src/elements/heap_map.dart';
 export 'package:observatory/src/elements/heap_profile.dart';
 export 'package:observatory/src/elements/heap_snapshot.dart';
 export 'package:observatory/src/elements/icdata_view.dart';
 export 'package:observatory/src/elements/instance_ref.dart';
 export 'package:observatory/src/elements/instance_view.dart';
 export 'package:observatory/src/elements/instructions_view.dart';
 export 'package:observatory/src/elements/io_view.dart';
 export 'package:observatory/src/elements/isolate_reconnect.dart';
-export 'package:observatory/src/elements/isolate_ref.dart';
 export 'package:observatory/src/elements/isolate_summary.dart';
 export 'package:observatory/src/elements/isolate_view.dart';
 export 'package:observatory/src/elements/json_view.dart';
 export 'package:observatory/src/elements/library_ref.dart';
 export 'package:observatory/src/elements/library_view.dart';
 export 'package:observatory/src/elements/logging.dart';
 export 'package:observatory/src/elements/megamorphiccache_view.dart';
 export 'package:observatory/src/elements/metrics.dart';
-export 'package:observatory/src/elements/nav_bar.dart';
 export 'package:observatory/src/elements/object_common.dart';
 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_application.dart';
 export 'package:observatory/src/elements/observatory_element.dart';
 export 'package:observatory/src/elements/persistent_handles.dart';
 export 'package:observatory/src/elements/ports.dart';
 export 'package:observatory/src/elements/script_inset.dart';
-export 'package:observatory/src/elements/script_ref.dart';
 export 'package:observatory/src/elements/script_view.dart';
 export 'package:observatory/src/elements/service_ref.dart';
 export 'package:observatory/src/elements/service_view.dart';
-export 'package:observatory/src/elements/sliding_checkbox.dart';
+export 'package:observatory/src/elements/source_link_wrapper.dart';
 export 'package:observatory/src/elements/timeline_page.dart';
+export 'package:observatory/src/elements/vm_view.dart';
+
+import 'dart:async';
+
+import 'package:observatory/src/elements/any_service_ref_wrapper.dart';
+import 'package:observatory/src/elements/curly_block.dart';
+import 'package:observatory/src/elements/curly_block_wrapper.dart';
+import 'package:observatory/src/elements/error_ref.dart';
+import 'package:observatory/src/elements/error_ref_wrapper.dart';
+import 'package:observatory/src/elements/isolate_ref.dart';
+import 'package:observatory/src/elements/isolate_ref_wrapper.dart';
+import 'package:observatory/src/elements/nav/bar.dart';
+import 'package:observatory/src/elements/nav/class_menu.dart';
+import 'package:observatory/src/elements/nav/class_menu_wrapper.dart';
+import 'package:observatory/src/elements/nav/isolate_menu.dart';
+import 'package:observatory/src/elements/nav/isolate_menu_wrapper.dart';
+import 'package:observatory/src/elements/nav/library_menu.dart';
+import 'package:observatory/src/elements/nav/library_menu_wrapper.dart';
+import 'package:observatory/src/elements/nav/menu.dart';
+import 'package:observatory/src/elements/nav/menu_wrapper.dart';
+import 'package:observatory/src/elements/nav/menu_item.dart';
+import 'package:observatory/src/elements/nav/menu_item_wrapper.dart';
+import 'package:observatory/src/elements/nav/notify.dart';
+import 'package:observatory/src/elements/nav/notify_wrapper.dart';
+import 'package:observatory/src/elements/nav/notify_event.dart';
+import 'package:observatory/src/elements/nav/notify_exception.dart';
+import 'package:observatory/src/elements/nav/refresh.dart';
+import 'package:observatory/src/elements/nav/refresh_wrapper.dart';
+import 'package:observatory/src/elements/nav/top_menu.dart';
+import 'package:observatory/src/elements/nav/top_menu_wrapper.dart';
+import 'package:observatory/src/elements/nav/vm_menu.dart';
+import 'package:observatory/src/elements/nav/vm_menu_wrapper.dart';
+import 'package:observatory/src/elements/script_ref.dart';
+import 'package:observatory/src/elements/script_ref_wrapper.dart';
+import 'package:observatory/src/elements/source_link.dart';
+import 'package:observatory/src/elements/source_link_wrapper.dart';
+import 'package:observatory/src/elements/view_footer.dart';
+import 'package:observatory/src/elements/vm_connect_target.dart';
+import 'package:observatory/src/elements/vm_connect.dart';
+
+export 'package:observatory/src/elements/helpers/rendering_queue.dart';
+
+export 'package:observatory/src/elements/any_service_ref_wrapper.dart';
+export 'package:observatory/src/elements/curly_block.dart';
+export 'package:observatory/src/elements/error_ref.dart';
+export 'package:observatory/src/elements/isolate_ref.dart';
+export 'package:observatory/src/elements/nav/bar.dart';
+export 'package:observatory/src/elements/nav/class_menu.dart';
+export 'package:observatory/src/elements/nav/isolate_menu.dart';
+export 'package:observatory/src/elements/nav/library_menu.dart';
+export 'package:observatory/src/elements/nav/menu.dart';
+export 'package:observatory/src/elements/nav/menu_item.dart';
+export 'package:observatory/src/elements/nav/notify.dart';
+export 'package:observatory/src/elements/nav/notify_event.dart';
+export 'package:observatory/src/elements/nav/notify_exception.dart';
+export 'package:observatory/src/elements/nav/refresh.dart';
+export 'package:observatory/src/elements/nav/top_menu.dart';
+export 'package:observatory/src/elements/nav/vm_menu.dart';
+export 'package:observatory/src/elements/script_ref.dart';
+export 'package:observatory/src/elements/source_link.dart';
 export 'package:observatory/src/elements/view_footer.dart';
+export 'package:observatory/src/elements/vm_connect_target.dart';
 export 'package:observatory/src/elements/vm_connect.dart';
-export 'package:observatory/src/elements/vm_ref.dart';
-export 'package:observatory/src/elements/vm_view.dart';
+
+// Even though this function does not invoke any asynchronous operation
+// it is marked as async to allow future backward compatible changes.
+Future initElements() async {
+  AnyServiceRefElementWrapper.tag.ensureRegistration();
+  CurlyBlockElement.tag.ensureRegistration();
+  CurlyBlockElementWrapper.tag.ensureRegistration();
+  ErrorRefElement.tag.ensureRegistration();
+  ErrorRefElementWrapper.tag.ensureRegistration();
+  IsolateRefElement.tag.ensureRegistration();
+  IsolateRefElementWrapper.tag.ensureRegistration();
+  NavBarElement.tag.ensureRegistration();
+  NavClassMenuElement.tag.ensureRegistration();
+  NavClassMenuElementWrapper.tag.ensureRegistration();
+  NavIsolateMenuElement.tag.ensureRegistration();
+  NavIsolateMenuElementWrapper.tag.ensureRegistration();
+  NavLibraryMenuElement.tag.ensureRegistration();
+  NavLibraryMenuElementWrapper.tag.ensureRegistration();
+  NavMenuElement.tag.ensureRegistration();
+  NavMenuElementWrapper.tag.ensureRegistration();
+  NavMenuItemElement.tag.ensureRegistration();
+  NavMenuItemElementWrapper.tag.ensureRegistration();
+  NavNotifyElementWrapper.tag.ensureRegistration();
+  NavNotifyElement.tag.ensureRegistration();
+  NavNotifyExceptionElement.tag.ensureRegistration();
+  NavNotifyEventElement.tag.ensureRegistration();
+  NavRefreshElement.tag.ensureRegistration();
+  NavRefreshElementWrapper.tag.ensureRegistration();
+  NavTopMenuElement.tag.ensureRegistration();
+  NavTopMenuElementWrapper.tag.ensureRegistration();
+  NavVMMenuElement.tag.ensureRegistration();
+  NavVMMenuElementWrapper.tag.ensureRegistration();
+  ScriptRefElement.tag.ensureRegistration();
+  ScriptRefElementWrapper.tag.ensureRegistration();
+  SourceLinkElement.tag.ensureRegistration();
+  SourceLinkElementWrapper.tag.ensureRegistration();
+  ViewFooterElement.tag.ensureRegistration();
+  // There is no ViewFooterElementWrapper because no binding it needed.
+  VMConnectTargetElement.tag.ensureRegistration();
+  VMConnectElement.tag.ensureRegistration();
+}