Add a VM page to the observatory.

runtime/bin/vmservice/client/lib/src/service/service.dart

Index: runtime/bin/vmservice/client/lib/src/service/service.dart
diff --git a/runtime/bin/vmservice/client/lib/src/service/service.dart b/runtime/bin/vmservice/client/lib/src/service/service.dart
index bc160d88a9f93715a6ada0beb860f5d3c078ca95..78c105dced1d6af9e80609a2492f3fc15e496fe3 100644
--- a/runtime/bin/vmservice/client/lib/src/service/service.dart
+++ b/runtime/bin/vmservice/client/lib/src/service/service.dart
@@ -54,10 +54,12 @@ ServiceObject _upgradeToServiceObject(VM vm, Isolate isolate, ObservableMap m) {
   var type = ServiceObject.stripRef(m['type']);
   switch (type) {
     case 'Error':
-      return new ServiceError.fromMap(isolate, m);
-    case 'IsolateList':
-      vm.isolates.update(m);
-      return vm.isolates;
+      if (isolate != null) {
+        return new ServiceError.fromMap(isolate, m);
+      } else {
+        return new ServiceError.fromMap(vm, m);
+      }
+      break;
     case 'Script':
       return isolate.scripts.putIfAbsent(m);
     case 'Code':
@@ -68,6 +70,8 @@ ServiceObject _upgradeToServiceObject(VM vm, Isolate isolate, ObservableMap m) {
       return isolate.classes.putIfAbsent(m);
     case 'Function':
       return isolate.functions.putIfAbsent(m);
+    case 'VM':
+      return vm.update(m);
   }
   return new ServiceMap.fromMap(isolate, m);
 }