Move another block of extension tests to manifest_version 2.

chrome/test/data/extensions/api_test/lazy_background_page/browser_action_with_callback/background.js

Index: chrome/test/data/extensions/api_test/lazy_background_page/browser_action_with_callback/background.js
===================================================================
--- chrome/test/data/extensions/api_test/lazy_background_page/browser_action_with_callback/background.js	(revision 0)
+++ chrome/test/data/extensions/api_test/lazy_background_page/browser_action_with_callback/background.js	(revision 0)
@@ -0,0 +1,17 @@
+// 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.
+
+chrome.browserAction.onClicked.addListener(function(tab) {
+  // Look for an existing tab for the extensions page before opening a new one.
+  chrome.tabs.getAllInWindow(null, function(tabs) {
+    var chromeExtUrl = "chrome://extensions/";
+    for (var i = 0; i < tabs.length; i++) {
+      if (tabs[i].url == chromeExtUrl){
+        chrome.tabs.update(tabs[i].id, {selected: true});
+        return;
+      }
+    }
+    chrome.tabs.create({url: chromeExtUrl, selected: true});
+  });
+});