Add manifest_version 2 to yet more extension tests.

chrome/test/data/extensions/uitest/window_open/test.js

Index: chrome/test/data/extensions/uitest/window_open/test.js
===================================================================
--- chrome/test/data/extensions/uitest/window_open/test.js	(revision 0)
+++ chrome/test/data/extensions/uitest/window_open/test.js	(revision 0)
@@ -0,0 +1,8 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function testWindowOpen(url) {
+  window.open(url);
+  window.domAutomationController.send(true);
+}