Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_IDBDatabaseErrorWrappingImplementation.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 _IDBDatabaseErrorWrappingImplementation extends DOMWrapperBase implements IDBDatabaseError {
-  _IDBDatabaseErrorWrappingImplementation() : super() {}
-
-  static create__IDBDatabaseErrorWrappingImplementation() native {
-    return new _IDBDatabaseErrorWrappingImplementation();
-  }
-
-  int get code() { return _get_code(this); }
-  static int _get_code(var _this) native;
-
-  void set code(int value) { _set_code(this, value); }
-  static void _set_code(var _this, int value) native;
-
-  String get message() { return _get_message(this); }
-  static String _get_message(var _this) native;
-
-  void set message(String value) { _set_message(this, value); }
-  static void _set_message(var _this, String value) native;
-
-  String get typeName() { return "IDBDatabaseError"; }
-}