Add constructors to all the event classes.

client/html/generated/src/wrapping/_StorageEventWrappingImplementation.dart

-// 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.
-
-class StorageEventWrappingImplementation extends EventWrappingImplementation implements StorageEvent {
-  StorageEventWrappingImplementation._wrap(ptr) : super._wrap(ptr) {}
-
-  String get key() { return _ptr.key; }
-
-  String get newValue() { return _ptr.newValue; }
-
-  String get oldValue() { return _ptr.oldValue; }
-
-  Storage get storageArea() { return LevelDom.wrapStorage(_ptr.storageArea); }
-
-  String get url() { return _ptr.url; }
-
-  void initStorageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, String keyArg, String oldValueArg, String newValueArg, String urlArg, Storage storageAreaArg) {
-    _ptr.initStorageEvent(typeArg, canBubbleArg, cancelableArg, keyArg, oldValueArg, newValueArg, urlArg, LevelDom.unwrap(storageAreaArg));
-    return;
-  }
-}