Move another block of extension tests to manifest_version 2.

chrome/test/data/extensions/api_test/infobars/infobarA.js

Index: chrome/test/data/extensions/api_test/infobars/infobarA.js
===================================================================
--- chrome/test/data/extensions/api_test/infobars/infobarA.js	(revision 0)
+++ chrome/test/data/extensions/api_test/infobars/infobarA.js	(revision 0)
@@ -0,0 +1,10 @@
+// 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.
+
+const assertEq = chrome.test.assertEq;
+var background_page = chrome.extension.getBackgroundPage();
+chrome.tabs.getCurrent(function(tab) {
+  assertEq(background_page.tabA, tab.id);
+  background_page.infobarCallbackA();
+});