Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_UIEventWrappingImplementation.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 _UIEventWrappingImplementation extends _EventWrappingImplementation implements UIEvent {
-  _UIEventWrappingImplementation() : super() {}
-
-  static create__UIEventWrappingImplementation() native {
-    return new _UIEventWrappingImplementation();
-  }
-
-  int get charCode() { return _get_charCode(this); }
-  static int _get_charCode(var _this) native;
-
-  int get detail() { return _get_detail(this); }
-  static int _get_detail(var _this) native;
-
-  int get keyCode() { return _get_keyCode(this); }
-  static int _get_keyCode(var _this) native;
-
-  int get layerX() { return _get_layerX(this); }
-  static int _get_layerX(var _this) native;
-
-  int get layerY() { return _get_layerY(this); }
-  static int _get_layerY(var _this) native;
-
-  int get pageX() { return _get_pageX(this); }
-  static int _get_pageX(var _this) native;
-
-  int get pageY() { return _get_pageY(this); }
-  static int _get_pageY(var _this) native;
-
-  DOMWindow get view() { return _get_view(this); }
-  static DOMWindow _get_view(var _this) native;
-
-  int get which() { return _get_which(this); }
-  static int _get_which(var _this) native;
-
-  void initUIEvent(String type, bool canBubble, bool cancelable, DOMWindow view, int detail) {
-    _initUIEvent(this, type, canBubble, cancelable, view, detail);
-    return;
-  }
-  static void _initUIEvent(receiver, type, canBubble, cancelable, view, detail) native;
-
-  String get typeName() { return "UIEvent"; }
-}