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

runtime/observatory/tests/service/isolate_lifecycle_test.dart

Index: runtime/observatory/tests/service/isolate_lifecycle_test.dart
diff --git a/runtime/observatory/tests/service/isolate_lifecycle_test.dart b/runtime/observatory/tests/service/isolate_lifecycle_test.dart
index be878a222ca6b9aa714ae88f93bdca806ef724e1..318013706ab094fe287449d40e796c4a9840de83 100644
--- a/runtime/observatory/tests/service/isolate_lifecycle_test.dart
+++ b/runtime/observatory/tests/service/isolate_lifecycle_test.dart
@@ -55,7 +55,7 @@ var tests = [
     // Wait for the testee to start all of the isolates.
     if (vm.isolates.length != spawnCount + 1) {
       await processServiceEvents(vm, (event, sub, completer) {
-        if (event.eventType == ServiceEvent.kIsolateStart) {
+        if (event.kind == ServiceEvent.kIsolateStart) {
           if (vm.isolates.length == spawnCount + 1) {
             sub.cancel();
             completer.complete(null);
@@ -77,7 +77,7 @@ var tests = [
     // Wait for all spawned isolates to hit pause-at-exit.
     if (numPaused(vm) != spawnCount) {
       await processServiceEvents(vm, (event, sub, completer) {
-        if (event.eventType == ServiceEvent.kPauseExit) {
+        if (event.kind == ServiceEvent.kPauseExit) {
           if (numPaused(vm) == spawnCount) {
             sub.cancel();
             completer.complete(null);
@@ -93,7 +93,7 @@ var tests = [
   (VM vm) async {
     var resumedReceived = 0;
     var eventsDone = processServiceEvents(vm, (event, sub, completer) {
-      if (event.eventType == ServiceEvent.kIsolateExit) {
+      if (event.kind == ServiceEvent.kIsolateExit) {
         resumedReceived++;
         if (resumedReceived == resumeCount) {
           sub.cancel();