Omnibus Observatory UI fixes:

runtime/observatory/lib/src/elements/field_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/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 import 'package:observatory/src/elements/helpers/uris.dart';
 import 'package:observatory/src/elements/instance_ref.dart';
 
 class FieldRefElement extends HtmlElement implements Renderable {
   static const tag = const Tag<FieldRefElement>('field-ref',
       dependencies: const [InstanceRefElement.tag]);
 
   RenderingScheduler<FieldRefElement> _r;
 
   Stream<RenderedEvent<FieldRefElement>> get onRendered => _r.onRendered;
 
   M.IsolateRef _isolate;
   M.FieldRef _field;
-  M.InstanceRepository _instances;
+  M.ObjectRepository _objects;
 
   M.IsolateRef get isolate => _isolate;
   M.FieldRef get field => _field;
 
   factory FieldRefElement(
-      M.IsolateRef isolate, M.FieldRef field, M.InstanceRepository instances,
+      M.IsolateRef isolate, M.FieldRef field, M.ObjectRepository objects,
       {RenderingQueue queue}) {
     assert(isolate != null);
     assert(field != null);
-    assert(instances != null);
+    assert(objects != null);
     FieldRefElement e = document.createElement(tag.name);
     e._r = new RenderingScheduler(e, queue: queue);
     e._isolate = isolate;
     e._field = field;
-    e._instances = instances;
+    e._objects = objects;
     return e;
   }
 
   FieldRefElement.created() : super.created();
 
   @override
   void attached() {
     super.attached();
     _r.enable();
   }
@@ skipping 23 matching lines @@
     }
     if (_field.declaredType.name == 'dynamic') {
       children = [
         new SpanElement()..text = header,
         new AnchorElement(href: Uris.inspect(_isolate, object: _field))
           ..text = _field.name
       ];
     } else {
       children = [
         new SpanElement()..text = header,
-        new InstanceRefElement(_isolate, _field.declaredType, _instances,
+        new InstanceRefElement(_isolate, _field.declaredType, _objects,
             queue: _r.queue),
         new SpanElement()..text = ' ',
         new AnchorElement(href: Uris.inspect(_isolate, object: _field))
           ..text = _field.name
       ];
     }
   }
 }