Omnibus Observatory UI fixes:

runtime/observatory/tests/observatory_ui/inbound_references/element_test.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 'package:unittest/unittest.dart';
 import 'package:observatory/src/elements/curly_block.dart';
 import 'package:observatory/src/elements/inbound_references.dart';
 import 'package:observatory/src/elements/instance_ref.dart';
 import '../mocks.dart';
 
 main() {
   InboundReferencesElement.tag.ensureRegistration();
 
   final cTag = CurlyBlockElement.tag.name;
   final iTag = InstanceRefElement.tag.name;
   final rTag = InboundReferencesElement.tag.name;
 
   const isolate = const IsolateRefMock();
   const object = const InstanceRefMock();
   final inbounds = new InboundReferencesRepositoryMock();
-  final instances = new InstanceRepositoryMock();
+  final objects = new ObjectRepositoryMock();
   test('instantiation', () {
-    final e =
-        new InboundReferencesElement(isolate, object, inbounds, instances);
+    final e = new InboundReferencesElement(isolate, object, inbounds, objects);
     expect(e, isNotNull, reason: 'element correctly created');
     expect(e.isolate, equals(isolate));
     expect(e.object, equals(object));
   });
   test('elements created after attachment', () async {
     const source = const InstanceRefMock(id: 'source-id', name: 'source_name');
     const references = const InboundReferencesMock(
         elements: const [const InboundReferenceMock(source: source)]);
     bool invoked = false;
     final inbounds = new InboundReferencesRepositoryMock(
         getter: expectAsync((i, id) async {
       expect(i, equals(isolate));
       expect(id, equals(object.id));
       invoked = true;
       return references;
     }, count: 1));
-    final instances = new InstanceRepositoryMock();
-    final e =
-        new InboundReferencesElement(isolate, object, inbounds, instances);
+    final objects = new ObjectRepositoryMock();
+    final e = new InboundReferencesElement(isolate, object, inbounds, objects);
     document.body.append(e);
     await e.onRendered.first;
     expect(invoked, isFalse);
     expect(e.children.length, isNonZero, reason: 'has elements');
     expect(e.querySelectorAll(iTag).length, isZero);
     (e.querySelector(cTag) as CurlyBlockElement).toggle();
     await e.onRendered.first;
     expect(invoked, isTrue);
     expect(e.querySelectorAll(iTag).length, equals(1));
     expect(e.querySelectorAll(rTag).length, equals(1));
     e.remove();
     await e.onRendered.first;
     expect(e.children.length, isZero, reason: 'is empty');
   });
 }