Add constructors to all the event classes.

client/html/generated/src/interface/MessageEvent.dart

Index: client/html/generated/src/interface/MessageEvent.dart
diff --git a/client/html/generated/src/interface/MessageEvent.dart b/client/html/generated/src/interface/MessageEvent.dart
deleted file mode 100644
index 50a41f236d6cb066405a19cdfd8f629b27aa9135..0000000000000000000000000000000000000000
--- a/client/html/generated/src/interface/MessageEvent.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) 2011, 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.
-
-// WARNING: Do not edit - generated code.
-
-interface MessageEvent extends Event {
-
-  String get data();
-
-  String get lastEventId();
-
-  MessagePort get messagePort();
-
-  String get origin();
-
-  Window get source();
-
-  void initMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, String dataArg, String originArg, String lastEventIdArg, Window sourceArg, MessagePort messagePort);
-}