Switch to using SourceLocation universally in service protocol.

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 85 matching lines @@
         _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();
+    }
   }
 
   @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() {
-    return isolate.reload();
+  Future refresh() async {
+    await isolate.reload();
+    if (isolate.topFrame != null) {
+      await isolate.topFrame.function.load();
+    }
   }
 
   Future refreshCoverage() {
     return isolate.refreshCoverage();
   }
 }