Standardize on using "kind" to distinguish sub-varieties of a type.

runtime/observatory/lib/src/app/application.dart

Index: runtime/observatory/lib/src/app/application.dart
diff --git a/runtime/observatory/lib/src/app/application.dart b/runtime/observatory/lib/src/app/application.dart
index ef8d5748ec6546ab04803baee0b9f18617912cae..8c8e00e3ad8c1a2e66dfb73dfb7dde93b16bb004 100644
--- a/runtime/observatory/lib/src/app/application.dart
+++ b/runtime/observatory/lib/src/app/application.dart
@@ -85,7 +85,7 @@ class ObservatoryApplication extends Observable {
   }
 
   void _onEvent(ServiceEvent event) {
-    switch(event.eventType) {
+    switch(event.kind) {
       case ServiceEvent.kIsolateStart:
       case ServiceEvent.kIsolateUpdate:
       case ServiceEvent.kGraph:
@@ -209,7 +209,7 @@ class ObservatoryApplication extends Observable {
     notifications.removeWhere((notification) {
         var event = notification.event;
         return (event != null &&
-                event.eventType == ServiceEvent.kConnectionClosed);
+                event.kind == ServiceEvent.kConnectionClosed);
       });
   }