Move a bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/browser_action/add_popup/background.js

Index: chrome/test/data/extensions/api_test/browser_action/add_popup/background.js
===================================================================
--- chrome/test/data/extensions/api_test/browser_action/add_popup/background.js	(revision 0)
+++ chrome/test/data/extensions/api_test/browser_action/add_popup/background.js	(revision 0)
@@ -0,0 +1,15 @@
+// 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.tabs.getSelected(null, function(tab) {
+  // When the browser action is clicked, add a popup.
+  chrome.browserAction.onClicked.addListener(function(tab) {
+    chrome.browserAction.setPopup({
+      tabId: tab.id,
+      popup: 'a_popup.html'
+    });
+    chrome.test.notifyPass();
+  });
+  chrome.test.notifyPass();
+});