Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_DedicatedWorkerContextWrappingImplementation.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 _DedicatedWorkerContextWrappingImplementation extends _WorkerContextWrappingImplementation implements DedicatedWorkerContext {
-  _DedicatedWorkerContextWrappingImplementation() : super() {}
-
-  static create__DedicatedWorkerContextWrappingImplementation() native {
-    return new _DedicatedWorkerContextWrappingImplementation();
-  }
-
-  EventListener get onmessage() { return _get_onmessage(this); }
-  static EventListener _get_onmessage(var _this) native;
-
-  void set onmessage(EventListener value) { _set_onmessage(this, value); }
-  static void _set_onmessage(var _this, EventListener value) native;
-
-  void postMessage(Object message, [List messagePorts = null]) {
-    if (messagePorts === null) {
-      _postMessage(this, message);
-      return;
-    } else {
-      _postMessage_2(this, message, messagePorts);
-      return;
-    }
-  }
-  static void _postMessage(receiver, message) native;
-  static void _postMessage_2(receiver, message, messagePorts) native;
-
-  void webkitPostMessage(Object message, [List transferList = null]) {
-    if (transferList === null) {
-      _webkitPostMessage(this, message);
-      return;
-    } else {
-      _webkitPostMessage_2(this, message, transferList);
-      return;
-    }
-  }
-  static void _webkitPostMessage(receiver, message) native;
-  static void _webkitPostMessage_2(receiver, message, transferList) native;
-
-  String get typeName() { return "DedicatedWorkerContext"; }
-}