Removed polymer & mirror from Observatory

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

-// Copyright (c) 2016, 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 'dart:async';
-
-import 'package:observatory/app.dart';
-import 'package:observatory/repositories.dart' show ScriptRepository;
-import 'package:observatory/service_html.dart' show SourceLocation;
-import 'package:observatory/src/elements/source_link.dart';
-import 'package:observatory/src/elements/helpers/tag.dart';
-import 'package:observatory/src/elements/shims/binding.dart';
-
-@bindable
-class SourceLinkElementWrapper extends HtmlElement {
-  static const binder = const Binder<SourceLinkElementWrapper>(const {
-      'location' : #location
-    });
-
-  static const tag = const Tag<SourceLinkElementWrapper>('source-link');
-
-  SourceLocation _location;
-  SourceLocation get location => location;
-  set location(SourceLocation value) {
-    _location = value;
-    render();
-  }
-
-  SourceLinkElementWrapper.created() : super.created() {
-    binder.registerCallback(this);
-    createShadowRoot();
-    render();
-  }
-
-  @override
-  void attached() {
-    super.attached();
-    render();
-  }
-
-  Future render() async {
-    shadowRoot.children = [];
-    if (_location == null) {
-      return;
-    }
-
-    shadowRoot.children = [
-      new StyleElement()
-        ..text = '''
-        source-link-wrapped > a[href]:hover {
-            text-decoration: underline;
-        }
-        source-link-wrapped > a[href] {
-            color: #0489c3;
-            text-decoration: none;
-        }''',
-      new SourceLinkElement(_location.isolate, _location,
-                            new ScriptRepository(),
-                            queue: ObservatoryApplication.app.queue)
-    ];
-  }
-}