Move another block of extension tests to manifest_version 2.

chrome/test/data/extensions/trigger_actions/page_action_popup/background.js

+// 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.
+
+// Show the page action icon for all tabs.
+chrome.tabs.onCreated.addListener(function(tab) {
+  chrome.tabs.getAllInWindow(null, function(tabs) {
+    for (var i = 0, t; t = tabs[i]; i++) {
+      chrome.pageAction.show(t.id);
+    }
+  });
+});