Omnibus Observatory UI fixes:

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

Index: runtime/observatory/lib/src/elements/inbound_references.dart
diff --git a/runtime/observatory/lib/src/elements/inbound_references.dart b/runtime/observatory/lib/src/elements/inbound_references.dart
index 8aab33a8e1b7adef76f916fcf3ff2ecc80458ab4..68a4be64bd8b5432e80e3e323649e3acd95748bb 100644
--- a/runtime/observatory/lib/src/elements/inbound_references.dart
+++ b/runtime/observatory/lib/src/elements/inbound_references.dart
@@ -23,7 +23,7 @@ class InboundReferencesElement extends HtmlElement implements Renderable {
   M.IsolateRef _isolate;
   M.ObjectRef _object;
   M.InboundReferencesRepository _references;
-  M.InstanceRepository _instances;
+  M.ObjectRepository _objects;
   M.InboundReferences _inbounds;
   bool _expanded = false;
 
@@ -31,18 +31,18 @@ class InboundReferencesElement extends HtmlElement implements Renderable {
   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;
   }
 
@@ -94,7 +94,7 @@ class InboundReferencesElement extends HtmlElement implements Renderable {
     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) {
@@ -106,9 +106,9 @@ class InboundReferencesElement extends HtmlElement implements Renderable {
     }
 
     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)
     ]);