Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_ClipboardWrappingImplementation.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 _ClipboardWrappingImplementation extends DOMWrapperBase implements Clipboard {
-  _ClipboardWrappingImplementation() : super() {}
-
-  static create__ClipboardWrappingImplementation() native {
-    return new _ClipboardWrappingImplementation();
-  }
-
-  String get dropEffect() { return _get_dropEffect(this); }
-  static String _get_dropEffect(var _this) native;
-
-  void set dropEffect(String value) { _set_dropEffect(this, value); }
-  static void _set_dropEffect(var _this, String value) native;
-
-  String get effectAllowed() { return _get_effectAllowed(this); }
-  static String _get_effectAllowed(var _this) native;
-
-  void set effectAllowed(String value) { _set_effectAllowed(this, value); }
-  static void _set_effectAllowed(var _this, String value) native;
-
-  FileList get files() { return _get_files(this); }
-  static FileList _get_files(var _this) native;
-
-  DataTransferItemList get items() { return _get_items(this); }
-  static DataTransferItemList _get_items(var _this) native;
-
-  List get types() { return _get_types(this); }
-  static List _get_types(var _this) native;
-
-  void clearData([String type = null]) {
-    if (type === null) {
-      _clearData(this);
-      return;
-    } else {
-      _clearData_2(this, type);
-      return;
-    }
-  }
-  static void _clearData(receiver) native;
-  static void _clearData_2(receiver, type) native;
-
-  String getData(String type) {
-    return _getData(this, type);
-  }
-  static String _getData(receiver, type) native;
-
-  bool setData(String type, String data) {
-    return _setData(this, type, data);
-  }
-  static bool _setData(receiver, type, data) native;
-
-  void setDragImage(HTMLImageElement image, int x, int y) {
-    _setDragImage(this, image, x, y);
-    return;
-  }
-  static void _setDragImage(receiver, image, x, y) native;
-
-  String get typeName() { return "Clipboard"; }
-}