Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_NotificationWrappingImplementation.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 _NotificationWrappingImplementation extends DOMWrapperBase implements Notification {
-  _NotificationWrappingImplementation() : super() {}
-
-  static create__NotificationWrappingImplementation() native {
-    return new _NotificationWrappingImplementation();
-  }
-
-  String get dir() { return _get_dir(this); }
-  static String _get_dir(var _this) native;
-
-  void set dir(String value) { _set_dir(this, value); }
-  static void _set_dir(var _this, String value) native;
-
-  String get replaceId() { return _get_replaceId(this); }
-  static String _get_replaceId(var _this) native;
-
-  void set replaceId(String value) { _set_replaceId(this, value); }
-  static void _set_replaceId(var _this, String value) native;
-
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) {
-    if (useCapture === null) {
-      _addEventListener_Notification(this, type, listener);
-      return;
-    } else {
-      _addEventListener_Notification_2(this, type, listener, useCapture);
-      return;
-    }
-  }
-  static void _addEventListener_Notification(receiver, type, listener) native;
-  static void _addEventListener_Notification_2(receiver, type, listener, useCapture) native;
-
-  void cancel() {
-    _cancel(this);
-    return;
-  }
-  static void _cancel(receiver) native;
-
-  bool dispatchEvent(Event evt) {
-    return _dispatchEvent_Notification(this, evt);
-  }
-  static bool _dispatchEvent_Notification(receiver, evt) native;
-
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) {
-    if (useCapture === null) {
-      _removeEventListener_Notification(this, type, listener);
-      return;
-    } else {
-      _removeEventListener_Notification_2(this, type, listener, useCapture);
-      return;
-    }
-  }
-  static void _removeEventListener_Notification(receiver, type, listener) native;
-  static void _removeEventListener_Notification_2(receiver, type, listener, useCapture) native;
-
-  void show() {
-    _show(this);
-    return;
-  }
-  static void _show(receiver) native;
-
-  String get typeName() { return "Notification"; }
-}