Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_WebKitBlobBuilderWrappingImplementation.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 _WebKitBlobBuilderWrappingImplementation extends DOMWrapperBase implements WebKitBlobBuilder {
-  _WebKitBlobBuilderWrappingImplementation() : super() {}
-
-  static create__WebKitBlobBuilderWrappingImplementation() native {
-    return new _WebKitBlobBuilderWrappingImplementation();
-  }
-
-  void append(var arrayBuffer_OR_blob_OR_value, [String endings = null]) {
-    if (arrayBuffer_OR_blob_OR_value is Blob) {
-      if (endings === null) {
-        _append(this, arrayBuffer_OR_blob_OR_value);
-        return;
-      }
-    } else {
-      if (arrayBuffer_OR_blob_OR_value is ArrayBuffer) {
-        if (endings === null) {
-          _append_2(this, arrayBuffer_OR_blob_OR_value);
-          return;
-        }
-      } else {
-        if (arrayBuffer_OR_blob_OR_value is String) {
-          if (endings === null) {
-            _append_3(this, arrayBuffer_OR_blob_OR_value);
-            return;
-          } else {
-            _append_4(this, arrayBuffer_OR_blob_OR_value, endings);
-            return;
-          }
-        }
-      }
-    }
-    throw "Incorrect number or type of arguments";
-  }
-  static void _append(receiver, arrayBuffer_OR_blob_OR_value) native;
-  static void _append_2(receiver, arrayBuffer_OR_blob_OR_value) native;
-  static void _append_3(receiver, arrayBuffer_OR_blob_OR_value) native;
-  static void _append_4(receiver, arrayBuffer_OR_blob_OR_value, endings) native;
-
-  Blob getBlob([String contentType = null]) {
-    if (contentType === null) {
-      return _getBlob(this);
-    } else {
-      return _getBlob_2(this, contentType);
-    }
-  }
-  static Blob _getBlob(receiver) native;
-  static Blob _getBlob_2(receiver, contentType) native;
-
-  String get typeName() { return "WebKitBlobBuilder"; }
-}