Generate callbacks as typedefs.

client/dom/generated/src/wrapping/_SQLTransactionCallbackWrappingImplementation.dart

Index: client/dom/generated/src/wrapping/_SQLTransactionCallbackWrappingImplementation.dart
diff --git a/client/dom/generated/src/wrapping/_SQLTransactionCallbackWrappingImplementation.dart b/client/dom/generated/src/wrapping/_SQLTransactionCallbackWrappingImplementation.dart
deleted file mode 100644
index d5666d800dd8763946f2cee9738e956fe9352847..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/wrapping/_SQLTransactionCallbackWrappingImplementation.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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 _SQLTransactionCallbackWrappingImplementation extends DOMWrapperBase implements SQLTransactionCallback {
-  _SQLTransactionCallbackWrappingImplementation() : super() {}
-
-  static create__SQLTransactionCallbackWrappingImplementation() native {
-    return new _SQLTransactionCallbackWrappingImplementation();
-  }
-
-  bool handleEvent(SQLTransaction transaction) {
-    return _handleEvent(this, transaction);
-  }
-  static bool _handleEvent(receiver, transaction) native;
-
-  String get typeName() { return "SQLTransactionCallback"; }
-}