Removed polymer & mirror from Observatory

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

-// 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/app.dart';
-import 'package:observatory/repositories.dart';
-import 'package:observatory/service_html.dart' show Field;
-import 'package:observatory/src/elements/field_ref.dart';
-import 'package:observatory/src/elements/helpers/tag.dart';
-import 'package:observatory/src/elements/shims/binding.dart';
-
-@bindable
-class FieldRefElementWrapper extends HtmlElement {
-
-  static const binder = const Binder<FieldRefElementWrapper>(const {
-      'ref': #ref
-    });
-
-  static const tag = const Tag<FieldRefElementWrapper>('field-ref');
-
-  Field _field;
-  Field get ref => _field;
-  void set ref(Field ref) {
-    _field = ref;
-    render();
-  }
-
-  FieldRefElementWrapper.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 StyleElement()
-        ..text = '''
-        field-ref-wrapped a[href]:hover {
-            text-decoration: underline;
-        }
-        field-ref-wrapped a[href] {
-            color: #0489c3;
-            text-decoration: none;
-        }''',
-      new FieldRefElement(_field.isolate, _field,
-                          new InstanceRepository(),
-                          queue: ObservatoryApplication.app.queue)
-    ];
-  }
-}