Fix some observatory analysis issues.

runtime/observatory/lib/src/elements/instance_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.
 
 import 'dart:html';
 import 'dart:async';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/curly_block.dart';
 import 'package:observatory/src/elements/field_ref.dart';
 import 'package:observatory/src/elements/helpers/any_ref.dart';
@@ skipping 80 matching lines @@
   }
 
   List<Element> _createShowMoreButton() {
     if (_loadedInstance.count == null) {
       return [];
     }
     final count = _loadedInstance.count;
     final button = new ButtonElement()..text = 'show next ${count}';
     button.onClick.listen((_) async {
       button.disabled = true;
-      _loadedInstance =
-          await _objects.get(_isolate, _instance.id, count: count * 2);
+      _loadedInstance = await _objects.get(_isolate, _instance.id);
       _r.dirty();
     });
     return [button];
   }
 
   List<Element> _createLink() {
     switch (_instance.kind) {
       case M.InstanceKind.vNull:
       case M.InstanceKind.bool:
       case M.InstanceKind.int:
@@ skipping 214 matching lines @@
           new BRElement(),
           new SpanElement()..text = '<value> : ',
           new InstanceRefElement(_isolate, _loadedInstance.value, _objects,
               queue: _r.queue),
         ];
       default:
         return [];
     }
   }
 }