Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_WebKitNamedFlowWrappingImplementation.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 _WebKitNamedFlowWrappingImplementation extends DOMWrapperBase implements WebKitNamedFlow {
-  _WebKitNamedFlowWrappingImplementation() : super() {}
-
-  static create__WebKitNamedFlowWrappingImplementation() native {
-    return new _WebKitNamedFlowWrappingImplementation();
-  }
-
-  bool get overflow() { return _get_overflow(this); }
-  static bool _get_overflow(var _this) native;
-
-  NodeList getRegionsByContentNode(Node contentNode) {
-    return _getRegionsByContentNode(this, contentNode);
-  }
-  static NodeList _getRegionsByContentNode(receiver, contentNode) native;
-
-  String get typeName() { return "WebKitNamedFlow"; }
-}