Wrapping leaf nodes in non polymer elements

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

Index: runtime/observatory/lib/src/elements/isolate_ref_wrapper.dart
diff --git a/runtime/observatory/lib/src/elements/isolate_ref_wrapper.dart b/runtime/observatory/lib/src/elements/isolate_ref_wrapper.dart
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+++ b/runtime/observatory/lib/src/elements/isolate_ref_wrapper.dart
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+// 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.
+
+import 'dart:html';
+import 'package:observatory/service_html.dart';
+import 'shims/binding.dart';
+import 'helpers/tag.dart';
+import 'isolate_ref.dart';
+
+class IsolateRefElementWrapper extends HtmlElement {
+
+  static final binder = new Binder<IsolateRefElementWrapper>(
+    const [const Binding('ref')]);
+
+  static const tag = const Tag<IsolateRefElementWrapper>('isolate-ref');
+
+  Isolate _ref;
+  Isolate get ref => _ref;
+  void set ref(Isolate ref) { _ref = ref; render();}
+
+  IsolateRefElementWrapper.created() : super.created() {
+    binder.registerCallback(this);
+    createShadowRoot();
+    render();
+  }
+
+  @override
+  void attached() {
+    super.attached();
+    render();
+  }
+
+  void render() {
+    shadowRoot.children = [];
+    if (ref == null) return;
+
+    shadowRoot.children = [
+      new IsolateRefElement(isolate: _ref)
+    ];
+  }
+}