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_connect.dart';
+export 'package:observatory/src/elements/vm_view.dart';
+
+import 'dart:async';
+
+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/script_ref.dart';
+import 'package:observatory/src/elements/script_ref_wrapper.dart';
+// There is no source_link.dart because it is the same as script_ref.
+import 'package:observatory/src/elements/source_link_wrapper.dart';
+import 'package:observatory/src/elements/view_footer.dart';
+// There is no view_footer_wrapper.dart because no binding is needed.
+import 'package:observatory/src/elements/vm_connect_target.dart';
+import 'package:observatory/src/elements/vm_connect_target_wrapper.dart';
+
+export 'package:observatory/src/elements/curly_block.dart';
+export 'package:observatory/src/elements/curly_block_wrapper.dart';
+export 'package:observatory/src/elements/error_ref.dart';
+export 'package:observatory/src/elements/error_ref_wrapper.dart';
+export 'package:observatory/src/elements/isolate_ref.dart';
+export 'package:observatory/src/elements/isolate_ref_wrapper.dart';
+export 'package:observatory/src/elements/script_ref.dart';
+export 'package:observatory/src/elements/script_ref_wrapper.dart';
+// There is no source_link.dart because it is the same as script_ref.
+export 'package:observatory/src/elements/source_link_wrapper.dart';
 export 'package:observatory/src/elements/view_footer.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';
+// There is no view_footer_wrapper.dart because no binding is needed.
+export 'package:observatory/src/elements/vm_connect_target.dart';
+export 'package:observatory/src/elements/vm_connect_target_wrapper.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 {
+  CurlyBlockElement.tag.ensureRegistration();
+  CurlyBlockElementWrapper.tag.ensureRegistration();
+  ErrorRefElement.tag.ensureRegistration();
+  ErrorRefElementWrapper.tag.ensureRegistration();
+  IsolateRefElement.tag.ensureRegistration();
+  IsolateRefElementWrapper.tag.ensureRegistration();
+  ScriptRefElement.tag.ensureRegistration();
+  ScriptRefElementWrapper.tag.ensureRegistration();
+  // There is no SourceLinkElement because it is the same as script_ref.
+  SourceLinkElementWrapper.tag.ensureRegistration();
+  ViewFooterElement.tag.ensureRegistration();
+  // There is no ViewFooterElementWrapper because no binding it needed.
+  VmConnectTargetElement.tag.ensureRegistration();
+  VmConnectTargetElementWrapper.tag.ensureRegistration();
+}