Update analysis.errors notification to the newest spec.

pkg/analysis_server/test/reflective_tests.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library reflective.tests;
 
 import 'dart:async';
 
 @MirrorsUsed(metaTargets: 'ReflectiveTestCase')
 import 'dart:mirrors';
@@ skipping 45 matching lines @@
     // solo_test_
     if (memberName.startsWith('solo_test_')) {
       String testName = memberName.substring('solo_test_'.length);
       solo_test(testName, () {
         return _runTest(classMirror, symbol);
       });
     }
   });
 }
 
+
 _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, []);
   } on NoSuchMethodError catch (e) {
   }
 }