Add enables consistent with Chrome's WebKit

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 blob_OR_value, [String endings = null]) {
-    if (blob_OR_value is Blob) {
+  void append(var arrayBuffer_OR_blob_OR_value, [String endings = null]) {
+    if (arrayBuffer_OR_blob_OR_value is Blob) {
       if (endings === null) {
-        _append(this, blob_OR_value);
+        _append(this, arrayBuffer_OR_blob_OR_value);
         return;
       }
     } else {
-      if (blob_OR_value is String) {
+      if (arrayBuffer_OR_blob_OR_value is ArrayBuffer) {
         if (endings === null) {
-          _append_2(this, blob_OR_value);
+          _append_2(this, arrayBuffer_OR_blob_OR_value);
           return;
-        } else {
-          _append_3(this, blob_OR_value, endings);
-          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, blob_OR_value) native;
-  static void _append_2(receiver, blob_OR_value) native;
-  static void _append_3(receiver, blob_OR_value, endings) native;
+  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"; }
 }