Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_CSSStyleSheetWrappingImplementation.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 _CSSStyleSheetWrappingImplementation extends _StyleSheetWrappingImplementation implements CSSStyleSheet {
-  _CSSStyleSheetWrappingImplementation() : super() {}
-
-  static create__CSSStyleSheetWrappingImplementation() native {
-    return new _CSSStyleSheetWrappingImplementation();
-  }
-
-  CSSRuleList get cssRules() { return _get_cssRules(this); }
-  static CSSRuleList _get_cssRules(var _this) native;
-
-  CSSRule get ownerRule() { return _get_ownerRule(this); }
-  static CSSRule _get_ownerRule(var _this) native;
-
-  CSSRuleList get rules() { return _get_rules(this); }
-  static CSSRuleList _get_rules(var _this) native;
-
-  int addRule(String selector, String style, [int index = null]) {
-    if (index === null) {
-      return _addRule(this, selector, style);
-    } else {
-      return _addRule_2(this, selector, style, index);
-    }
-  }
-  static int _addRule(receiver, selector, style) native;
-  static int _addRule_2(receiver, selector, style, index) native;
-
-  void deleteRule(int index) {
-    _deleteRule(this, index);
-    return;
-  }
-  static void _deleteRule(receiver, index) native;
-
-  int insertRule(String rule, int index) {
-    return _insertRule(this, rule, index);
-  }
-  static int _insertRule(receiver, rule, index) native;
-
-  void removeRule(int index) {
-    _removeRule(this, index);
-    return;
-  }
-  static void _removeRule(receiver, index) native;
-
-  String get typeName() { return "CSSStyleSheet"; }
-}