Fixing more cases of default values for events not working on Dartium.

tests/html/storage_test.dart

Index: tests/html/storage_test.dart
diff --git a/tests/html/storage_test.dart b/tests/html/storage_test.dart
index 9c0cc3f8f6907579c5176c7dcce5ec6c1c990084..5f09e20892334a855634723af3a74d1157917530 100644
--- a/tests/html/storage_test.dart
+++ b/tests/html/storage_test.dart
@@ -20,7 +20,7 @@ main() {
   test('event', () {
     // Bug 8076 that not all optional params are optional in Dartium.
     var event = new StorageEvent('something', oldValue: 'old', newValue: 'new',
-        url: 'url');
+        url: 'url', key: 'key');
     expect(event is StorageEvent, isTrue);
     expect(event.oldValue, 'old');
     expect(event.newValue, 'new');