Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_DatabaseSyncWrappingImplementation.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 _DatabaseSyncWrappingImplementation extends DOMWrapperBase implements DatabaseSync {
-  _DatabaseSyncWrappingImplementation() : super() {}
-
-  static create__DatabaseSyncWrappingImplementation() native {
-    return new _DatabaseSyncWrappingImplementation();
-  }
-
-  String get lastErrorMessage() { return _get_lastErrorMessage(this); }
-  static String _get_lastErrorMessage(var _this) native;
-
-  String get version() { return _get_version(this); }
-  static String _get_version(var _this) native;
-
-  void changeVersion(String oldVersion, String newVersion, [SQLTransactionSyncCallback callback = null]) {
-    _changeVersion(this, oldVersion, newVersion, callback);
-    return;
-  }
-  static void _changeVersion(receiver, oldVersion, newVersion, callback) native;
-
-  void readTransaction(SQLTransactionSyncCallback callback) {
-    _readTransaction(this, callback);
-    return;
-  }
-  static void _readTransaction(receiver, callback) native;
-
-  void transaction(SQLTransactionSyncCallback callback) {
-    _transaction(this, callback);
-    return;
-  }
-  static void _transaction(receiver, callback) native;
-
-  String get typeName() { return "DatabaseSync"; }
-}