Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_WebKitCSSKeyframeRuleWrappingImplementation.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 _WebKitCSSKeyframeRuleWrappingImplementation extends _CSSRuleWrappingImplementation implements WebKitCSSKeyframeRule {
-  _WebKitCSSKeyframeRuleWrappingImplementation() : super() {}
-
-  static create__WebKitCSSKeyframeRuleWrappingImplementation() native {
-    return new _WebKitCSSKeyframeRuleWrappingImplementation();
-  }
-
-  String get keyText() { return _get_keyText(this); }
-  static String _get_keyText(var _this) native;
-
-  void set keyText(String value) { _set_keyText(this, value); }
-  static void _set_keyText(var _this, String value) native;
-
-  CSSStyleDeclaration get style() { return _get_style(this); }
-  static CSSStyleDeclaration _get_style(var _this) native;
-
-  String get typeName() { return "WebKitCSSKeyframeRule"; }
-}