Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_OESVertexArrayObjectWrappingImplementation.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 _OESVertexArrayObjectWrappingImplementation extends DOMWrapperBase implements OESVertexArrayObject {
-  _OESVertexArrayObjectWrappingImplementation() : super() {}
-
-  static create__OESVertexArrayObjectWrappingImplementation() native {
-    return new _OESVertexArrayObjectWrappingImplementation();
-  }
-
-  void bindVertexArrayOES(WebGLVertexArrayObjectOES arrayObject) {
-    _bindVertexArrayOES(this, arrayObject);
-    return;
-  }
-  static void _bindVertexArrayOES(receiver, arrayObject) native;
-
-  WebGLVertexArrayObjectOES createVertexArrayOES() {
-    return _createVertexArrayOES(this);
-  }
-  static WebGLVertexArrayObjectOES _createVertexArrayOES(receiver) native;
-
-  void deleteVertexArrayOES(WebGLVertexArrayObjectOES arrayObject) {
-    _deleteVertexArrayOES(this, arrayObject);
-    return;
-  }
-  static void _deleteVertexArrayOES(receiver, arrayObject) native;
-
-  bool isVertexArrayOES(WebGLVertexArrayObjectOES arrayObject) {
-    return _isVertexArrayOES(this, arrayObject);
-  }
-  static bool _isVertexArrayOES(receiver, arrayObject) native;
-
-  String get typeName() { return "OESVertexArrayObject"; }
-}