Speculatively revert "Make the object store visible in Observatory."

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:observatory/service.dart';
@@ skipping 107 matching lines @@
         return element;
       case 'Library':
         LibraryRefElement element = new Element.tag('library-ref');
         element.ref = ref;
         element.asValue = asValue;
         return element;
       case 'Object':
         ServiceRefElement element = new Element.tag('object-ref');
         element.ref = ref;
         return element;
-      case '_ObjectStore':
-        ServiceRefElement element = new Element.tag('objectstore-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;
         if (expandKey != null) {
           element.expandKey = expandKey;
@@ skipping 20 matching lines @@
       return;
     }
     children.add(element);
   }
 }
 
 @CustomTag('object-ref')
 class ObjectRefElement extends ServiceRefElement {
   ObjectRefElement.created() : super.created();
 }