Minor Observatory UI tweaks.

runtime/observatory/lib/src/elements/isolate_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 isolate_view_element;
 
 import 'dart:async';
 import 'observatory_element.dart';
 import 'package:observatory/app.dart';
 import 'package:observatory/service.dart';
@@ skipping 61 matching lines @@
         'maxValue': 100.0,
       };
     }
     _chart.draw(_table);
   }
 }
 
 @CustomTag('isolate-view')
 class IsolateViewElement extends ObservatoryElement {
   @published Isolate isolate;
+  @published Library rootLibrary;
   Timer _updateTimer;
   TagProfileChart tagProfileChart = new TagProfileChart();
   IsolateViewElement.created() : super.created();
 
   Future<ServiceObject> evaluate(String expression) {
     return isolate.rootLibrary.evaluate(expression);
   }
 
   void _updateTagProfile() {
     isolate.updateTagProfile().then((tagProfile) {
       tagProfileChart.update(tagProfile);
       _drawTagProfileChart();
       if (_updateTimer != null) {
         // Start the timer again.
         _updateTimer = new Timer(new Duration(seconds: 1), _updateTagProfile);
       }
     });
   }
 
   @override
   void attached() {
     super.attached();
     // Start a timer to update the isolate summary once a second.
     _updateTimer = new Timer(new Duration(seconds: 1), _updateTagProfile);
     if (isolate.topFrame != null) {
       isolate.topFrame.function.load();
     }
+    isolate.rootLibrary.load().then((lib) => rootLibrary = lib);
   }
 
   @override
   void detached() {
     super.detached();
     if (_updateTimer != null) {
       _updateTimer.cancel();
       _updateTimer = null;
     }
   }
 
   void _drawTagProfileChart() {
     var element = shadowRoot.querySelector('#tagProfileChart');
     if (element != null) {
       tagProfileChart.draw(element);
     }
   }
 
   Future refresh() async {
     await isolate.reload();
     if (isolate.topFrame != null) {
       await isolate.topFrame.function.load();
     }
   }
 
   Future refreshCoverage() {
     return isolate.refreshCoverage();
   }
 }