Safely wrap window.top in frog dom.

client/dom/generated/src/wrapping/_DatabaseWrappingImplementation.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 _DatabaseWrappingImplementation extends DOMWrapperBase implements Database {
   _DatabaseWrappingImplementation() : super() {}
 
   static create__DatabaseWrappingImplementation() native {
     return new _DatabaseWrappingImplementation();
   }
 
   String get version() { return _get_version(this); }
   static String _get_version(var _this) native;
 
   void changeVersion(String oldVersion, String newVersion, [SQLTransactionCallback callback = null, SQLTransactionErrorCallback errorCallback = null, VoidCallback successCallback = null]) {
-    if (callback === null) {
-      if (errorCallback === null) {
-        if (successCallback === null) {
-          _changeVersion(this, oldVersion, newVersion);
-          return;
-        }
-      }
-    } else {
-      if (errorCallback === null) {
-        if (successCallback === null) {
-          _changeVersion_2(this, oldVersion, newVersion, callback);
-          return;
-        }
-      } else {
-        if (successCallback === null) {
-          _changeVersion_3(this, oldVersion, newVersion, callback, errorCallback);
-          return;
-        } else {
-          _changeVersion_4(this, oldVersion, newVersion, callback, errorCallback, successCallback);
-          return;
-        }
-      }
-    }
-    throw "Incorrect number or type of arguments";
+    _changeVersion(this, oldVersion, newVersion, callback, errorCallback, successCallback);
+    return;
   }
-  static void _changeVersion(receiver, oldVersion, newVersion) native;
-  static void _changeVersion_2(receiver, oldVersion, newVersion, callback) native;
-  static void _changeVersion_3(receiver, oldVersion, newVersion, callback, errorCallback) native;
-  static void _changeVersion_4(receiver, oldVersion, newVersion, callback, errorCallback, successCallback) native;
+  static void _changeVersion(receiver, oldVersion, newVersion, callback, errorCallback, successCallback) native;
 
   void readTransaction(SQLTransactionCallback callback, [SQLTransactionErrorCallback errorCallback = null, VoidCallback successCallback = null]) {
-    if (errorCallback === null) {
-      if (successCallback === null) {
-        _readTransaction(this, callback);
-        return;
-      }
-    } else {
-      if (successCallback === null) {
-        _readTransaction_2(this, callback, errorCallback);
-        return;
-      } else {
-        _readTransaction_3(this, callback, errorCallback, successCallback);
-        return;
-      }
-    }
-    throw "Incorrect number or type of arguments";
+    _readTransaction(this, callback, errorCallback, successCallback);
+    return;
   }
-  static void _readTransaction(receiver, callback) native;
-  static void _readTransaction_2(receiver, callback, errorCallback) native;
-  static void _readTransaction_3(receiver, callback, errorCallback, successCallback) native;
+  static void _readTransaction(receiver, callback, errorCallback, successCallback) native;
 
   void transaction(SQLTransactionCallback callback, [SQLTransactionErrorCallback errorCallback = null, VoidCallback successCallback = null]) {
-    if (errorCallback === null) {
-      if (successCallback === null) {
-        _transaction(this, callback);
-        return;
-      }
-    } else {
-      if (successCallback === null) {
-        _transaction_2(this, callback, errorCallback);
-        return;
-      } else {
-        _transaction_3(this, callback, errorCallback, successCallback);
-        return;
-      }
-    }
-    throw "Incorrect number or type of arguments";
+    _transaction(this, callback, errorCallback, successCallback);
+    return;
   }
-  static void _transaction(receiver, callback) native;
-  static void _transaction_2(receiver, callback, errorCallback) native;
-  static void _transaction_3(receiver, callback, errorCallback, successCallback) native;
+  static void _transaction(receiver, callback, errorCallback, successCallback) native;
 
   String get typeName() { return "Database"; }
 }