Omnibus Observatory UI fixes:

runtime/observatory/lib/src/elements/inbound_references.dart

 // Copyright (c) 2016, 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/instance_ref.dart';
 import 'package:observatory/src/elements/helpers/any_ref.dart';
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
 
 class InboundReferencesElement extends HtmlElement implements Renderable {
   static const tag = const Tag<InboundReferencesElement>('inbound-references',
       dependencies: const [CurlyBlockElement.tag, InstanceRefElement.tag]);
 
   RenderingScheduler<InboundReferencesElement> _r;
 
   Stream<RenderedEvent<InboundReferencesElement>> get onRendered =>
       _r.onRendered;
 
   M.IsolateRef _isolate;
   M.ObjectRef _object;
   M.InboundReferencesRepository _references;
-  M.InstanceRepository _instances;
+  M.ObjectRepository _objects;
   M.InboundReferences _inbounds;
   bool _expanded = false;
 
   M.IsolateRef get isolate => _isolate;
   M.ObjectRef get object => _object;
 
   factory InboundReferencesElement(M.IsolateRef isolate, M.ObjectRef object,
-      M.InboundReferencesRepository references, M.InstanceRepository instances,
+      M.InboundReferencesRepository references, M.ObjectRepository objects,
       {RenderingQueue queue}) {
     assert(isolate != null);
     assert(object != null);
     assert(references != null);
-    assert(instances != null);
+    assert(objects != null);
     InboundReferencesElement e = document.createElement(tag.name);
     e._r = new RenderingScheduler(e, queue: queue);
     e._isolate = isolate;
     e._object = object;
     e._references = references;
-    e._instances = instances;
+    e._objects = objects;
     return e;
   }
 
   InboundReferencesElement.created() : super.created();
 
   @override
   void attached() {
     super.attached();
     _r.enable();
   }
@@ skipping 31 matching lines @@
     }
     return _inbounds.elements.map(_createItem).toList();
   }
 
   Element _createItem(M.InboundReference reference) {
     final content = <Element>[];
 
     if (reference.parentField != null) {
       content.addAll([
         new SpanElement()..text = 'referenced by ',
-        anyRef(_isolate, reference.parentField, _instances, queue: _r.queue),
+        anyRef(_isolate, reference.parentField, _objects, queue: _r.queue),
         new SpanElement()..text = ' of '
       ]);
     } else if (reference.parentListIndex != null) {
       content.add(new SpanElement()
         ..text = 'referenced by [ ${reference.parentListIndex} ] of ');
     } else if (reference.parentWordOffset != null) {
       content.add(new SpanElement()
         ..text = 'referenced by offset ${reference.parentWordOffset} of ');
     }
 
     content.addAll([
-      anyRef(_isolate, reference.source, _instances, queue: _r.queue),
+      anyRef(_isolate, reference.source, _objects, queue: _r.queue),
       new InboundReferencesElement(
-          _isolate, reference.source, _references, _instances,
+          _isolate, reference.source, _references, _objects,
           queue: _r.queue)
     ]);
 
     return new DivElement()
       ..classes = ['indent']
       ..children = content;
   }
 }