Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_MessageEventWrappingImplementation.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 _MessageEventWrappingImplementation extends _EventWrappingImplementation implements MessageEvent {
-  _MessageEventWrappingImplementation() : super() {}
-
-  static create__MessageEventWrappingImplementation() native {
-    return new _MessageEventWrappingImplementation();
-  }
-
-  Object get data() { return _get_data(this); }
-  static Object _get_data(var _this) native;
-
-  String get lastEventId() { return _get_lastEventId(this); }
-  static String _get_lastEventId(var _this) native;
-
-  String get origin() { return _get_origin(this); }
-  static String _get_origin(var _this) native;
-
-  List get ports() { return _get_ports(this); }
-  static List _get_ports(var _this) native;
-
-  DOMWindow get source() { return _get_source(this); }
-  static DOMWindow _get_source(var _this) native;
-
-  void initMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, DOMWindow sourceArg, List messagePorts) {
-    _initMessageEvent(this, typeArg, canBubbleArg, cancelableArg, dataArg, originArg, lastEventIdArg, sourceArg, messagePorts);
-    return;
-  }
-  static void _initMessageEvent(receiver, typeArg, canBubbleArg, cancelableArg, dataArg, originArg, lastEventIdArg, sourceArg, messagePorts) native;
-
-  void webkitInitMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, DOMWindow sourceArg, List transferables) {
-    _webkitInitMessageEvent(this, typeArg, canBubbleArg, cancelableArg, dataArg, originArg, lastEventIdArg, sourceArg, transferables);
-    return;
-  }
-  static void _webkitInitMessageEvent(receiver, typeArg, canBubbleArg, cancelableArg, dataArg, originArg, lastEventIdArg, sourceArg, transferables) native;
-
-  String get typeName() { return "MessageEvent"; }
-}