Give instances their own model class; move DartErrors out of instance-ref into their own error-ref.

runtime/bin/vmservice/observatory/lib/src/elements/inbound_reference.dart

Index: runtime/bin/vmservice/observatory/lib/src/elements/inbound_reference.dart
diff --git a/runtime/bin/vmservice/observatory/lib/src/elements/inbound_reference.dart b/runtime/bin/vmservice/observatory/lib/src/elements/inbound_reference.dart
index cb738b5662d45e774c2355fe0db8e72279daa884..c71307f6a45c3df40fec07e85197ab3e800a3c1a 100644
--- a/runtime/bin/vmservice/observatory/lib/src/elements/inbound_reference.dart
+++ b/runtime/bin/vmservice/observatory/lib/src/elements/inbound_reference.dart
@@ -11,6 +11,7 @@ import 'service_ref.dart';
 
 @CustomTag('inbound-reference')
 class InboundReferenceElement extends ServiceRefElement {
+  @published ObservableMap ref;

[Cutch, 2014/08/28 14:46:05]

ServiceMap

[rmacnak, 2014/08/28 19:41:05]

We don't get a ServiceMap here for some reason.

   InboundReferenceElement.created() : super.created();
 
   dynamic get slot => ref['slot'];
@@ -32,7 +33,7 @@ class InboundReferenceElement extends ServiceRefElement {
   dynamic expander() {
     return expandEvent;
   }
- 
+
   void expandEvent(bool expand, var done) {
     assert(ref is ServiceMap);
     if (expand) {
@@ -40,9 +41,7 @@ class InboundReferenceElement extends ServiceRefElement {
         notifyPropertyChange(#ref, 0, 1);
       }).whenComplete(done);
     } else {
-      ServiceMap refMap = ref;
-      refMap['fields'] = null;
-      refMap['elements'] = null;
+      inboundReferences = null;
       done();
     }
   }