Extend Observatory to display libraries, classes, fields, functions and code.

runtime/bin/vmservice/client/lib/src/observatory_elements/json_view.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.
 
 library json_view_element;
 
 import 'package:polymer/polymer.dart';
 import 'observatory_element.dart';
 
 @CustomTag('json-view')
 class JsonViewElement extends ObservatoryElement {
-  @published dynamic get json => __$json; dynamic __$json = null; set json(dynamic value) { __$json = notifyPropertyChange(#json, __$json, value); }
+  @published var json = null;
   var _count = 0;
 
-  JsonViewElement() : super() {
+  JsonViewElement.created() : super.created();
+
+  void enteredView() {
+    super.enteredView();
+    _count = 0;
   }
 
   void jsonChanged(oldValue) {
-    this.notifyPropertyChange(#valueType, null, null);
+    notifyPropertyChange(#valueType, "a", "b");
   }
 
   String get primitiveString {
     return json.toString();
   }
 
   String get valueType {
     if (json is Map) {
       return 'Map';
     } else if (json is List) {
@@ skipping 17 matching lines @@
     if (json is Map) {
       return json.keys.toList();
     }
     return [];
   }
 
   dynamic value(String key) {
     return json[key];
   }
 }