Introduce Instance.kind.

runtime/observatory/lib/src/elements/service_ref.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 service_ref_element;
 
 import 'dart:html';
 import 'package:logging/logging.dart';
 import 'package:polymer/polymer.dart';
 import 'observatory_element.dart';
@@ skipping 84 matching lines @@
         element.ref = ref;
         return element;
       case 'Object':
         ServiceRefElement element = new Element.tag('object-ref');
         element.ref = ref;
         return element;
       case 'Script':
         ServiceRefElement element = new Element.tag('script-ref');
         element.ref = ref;
         return element;
+      case 'Instance':
+      case 'Sentinel':
+        ServiceRefElement element = new Element.tag('instance-ref');
+        element.ref = ref;
+        return element;
       default:
-        if (ref.isInstance ||
-            ref.isSentinel) {  // TODO(rmacnak): Separate this out.
-          ServiceRefElement element = new Element.tag('instance-ref');
-          element.ref = ref;
-          return element;
-        } else {
-          SpanElement element = new Element.tag('span');
-          element.text = "<<Unknown service ref: $ref>>";
-          return element;
-        }
+        SpanElement element = new Element.tag('span');
+        element.text = "<<Unknown service ref: $ref>>";
+        return element;
     }
   }
 
   refChanged(oldValue) {
     // Remove the current view.
     children.clear();
     if (ref == null) {
       Logger.root.info('Viewing null object.');
       return;
     }
     var type = ref.vmType;
     var element = _constructElementForRef();
     if (element == null) {
       Logger.root.info('Unable to find a ref element for \'${type}\'');
       return;
     }
     children.add(element);
   }
 }
 
 @CustomTag('object-ref')
 class ObjectRefElement extends ServiceRefElement {
   ObjectRefElement.created() : super.created();
 }