Remove generated directories with 100s of files.

client/dom/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() : super() {}
-
-  static create__StorageEventWrappingImplementation() native {
-    return new _StorageEventWrappingImplementation();
-  }
-
-  String get key() { return _get_key(this); }
-  static String _get_key(var _this) native;
-
-  String get newValue() { return _get_newValue(this); }
-  static String _get_newValue(var _this) native;
-
-  String get oldValue() { return _get_oldValue(this); }
-  static String _get_oldValue(var _this) native;
-
-  Storage get storageArea() { return _get_storageArea(this); }
-  static Storage _get_storageArea(var _this) native;
-
-  String get url() { return _get_url(this); }
-  static String _get_url(var _this) native;
-
-  void initStorageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, String keyArg, String oldValueArg, String newValueArg, String urlArg, Storage storageAreaArg) {
-    _initStorageEvent(this, typeArg, canBubbleArg, cancelableArg, keyArg, oldValueArg, newValueArg, urlArg, storageAreaArg);
-    return;
-  }
-  static void _initStorageEvent(receiver, typeArg, canBubbleArg, cancelableArg, keyArg, oldValueArg, newValueArg, urlArg, storageAreaArg) native;
-
-  String get typeName() { return "StorageEvent"; }
-}