Add constructors to all the event classes.

client/html/src/UIEvent.dart

Index: client/html/src/UIEvent.dart
diff --git a/client/html/generated/src/interface/UIEvent.dart b/client/html/src/UIEvent.dart
similarity index 71%
rename from client/html/generated/src/interface/UIEvent.dart
rename to client/html/src/UIEvent.dart
index 34adc8517c8939a70c555746d767878d5bfb5d2f..6ede73117c0dc16446725d21710b5e5353cc8145 100644
--- a/client/html/generated/src/interface/UIEvent.dart
+++ b/client/html/src/UIEvent.dart
@@ -2,9 +2,10 @@
 // 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 UIEvent extends Event factory UIEventWrappingImplementation {
 
-interface UIEvent extends Event {
+  UIEvent(String type, Window view, int detail, [bool canBubble,
+      bool cancelable]);
 
   int get charCode();
 
@@ -23,6 +24,4 @@ interface UIEvent extends Event {
   Window get view();
 
   int get which();
-
-  void initUIEvent(String type, bool canBubble, bool cancelable, Window view, int detail);
 }