Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_WebKitCSSKeyframesRuleWrappingImplementation.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 _WebKitCSSKeyframesRuleWrappingImplementation extends _CSSRuleWrappingImplementation implements WebKitCSSKeyframesRule {
-  _WebKitCSSKeyframesRuleWrappingImplementation() : super() {}
-
-  static create__WebKitCSSKeyframesRuleWrappingImplementation() native {
-    return new _WebKitCSSKeyframesRuleWrappingImplementation();
-  }
-
-  CSSRuleList get cssRules() { return _get_cssRules(this); }
-  static CSSRuleList _get_cssRules(var _this) native;
-
-  String get name() { return _get_name(this); }
-  static String _get_name(var _this) native;
-
-  void set name(String value) { _set_name(this, value); }
-  static void _set_name(var _this, String value) native;
-
-  void deleteRule(String key) {
-    _deleteRule(this, key);
-    return;
-  }
-  static void _deleteRule(receiver, key) native;
-
-  WebKitCSSKeyframeRule findRule(String key) {
-    return _findRule(this, key);
-  }
-  static WebKitCSSKeyframeRule _findRule(receiver, key) native;
-
-  void insertRule(String rule) {
-    _insertRule(this, rule);
-    return;
-  }
-  static void _insertRule(receiver, rule) native;
-
-  String get typeName() { return "WebKitCSSKeyframesRule"; }
-}