Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_HistoryWrappingImplementation.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 _HistoryWrappingImplementation extends DOMWrapperBase implements History {
-  _HistoryWrappingImplementation() : super() {}
-
-  static create__HistoryWrappingImplementation() native {
-    return new _HistoryWrappingImplementation();
-  }
-
-  int get length() { return _get_length(this); }
-  static int _get_length(var _this) native;
-
-  Dynamic get state() { return _get_state(this); }
-  static Dynamic _get_state(var _this) native;
-
-  void back() {
-    _back(this);
-    return;
-  }
-  static void _back(receiver) native;
-
-  void forward() {
-    _forward(this);
-    return;
-  }
-  static void _forward(receiver) native;
-
-  void go(int distance) {
-    _go(this, distance);
-    return;
-  }
-  static void _go(receiver, distance) native;
-
-  void pushState(Object data, String title, [String url = null]) {
-    if (url === null) {
-      _pushState(this, data, title);
-      return;
-    } else {
-      _pushState_2(this, data, title, url);
-      return;
-    }
-  }
-  static void _pushState(receiver, data, title) native;
-  static void _pushState_2(receiver, data, title, url) native;
-
-  void replaceState(Object data, String title, [String url = null]) {
-    if (url === null) {
-      _replaceState(this, data, title);
-      return;
-    } else {
-      _replaceState_2(this, data, title, url);
-      return;
-    }
-  }
-  static void _replaceState(receiver, data, title) native;
-  static void _replaceState_2(receiver, data, title, url) native;
-
-  String get typeName() { return "History"; }
-}