Update analysis.errors notification to the newest spec.

pkg/analysis_server/test/reflective_tests.dart

Index: pkg/analysis_server/test/reflective_tests.dart
diff --git a/pkg/analysis_server/test/reflective_tests.dart b/pkg/analysis_server/test/reflective_tests.dart
index 622ab5fe6e58a81493065ee309897935ede5ee06..5cfef6af8a66b75d7c21f0fd4faf0513c5454c01 100644
--- a/pkg/analysis_server/test/reflective_tests.dart
+++ b/pkg/analysis_server/test/reflective_tests.dart
@@ -63,21 +63,34 @@ void runReflectiveTests(Type type) {
   });
 }
 
+
 _runTest(ClassMirror classMirror, Symbol symbol) {
   InstanceMirror instanceMirror = classMirror.newInstance(new Symbol(''), []);
+  bool shouldRunTearDown = true;
   _invokeSymbolIfExists(instanceMirror, #setUp);
-  var testReturn = instanceMirror.invoke(symbol, []).reflectee;
-  if (testReturn is Future) {
-    return testReturn.whenComplete(() {
-      _invokeSymbolIfExists(instanceMirror, #tearDown);
-    });
-  } else {
-    _invokeSymbolIfExists(instanceMirror, #tearDown);
-    return testReturn;
+  try {
+    var testReturn = instanceMirror.invoke(symbol, []).reflectee;
+    if (testReturn is Future) {
+      shouldRunTearDown = false;
+      return testReturn.whenComplete(() {
+        _invokeTearDown(instanceMirror);
+      });
+    } else {
+      return testReturn;
+    }
+  } finally {
+    if (shouldRunTearDown) {
+      _invokeTearDown(instanceMirror);
+    }
   }
 }
 
 
+void _invokeTearDown(InstanceMirror instanceMirror) {
+  _invokeSymbolIfExists(instanceMirror, #tearDown);
+}
+
+
 void _invokeSymbolIfExists(InstanceMirror instanceMirror, Symbol symbol) {
   try {
     instanceMirror.invoke(symbol, []);