Move another block of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/processes/onupdated/background.html

-<script>
-// Add a simple listener to onUpdated to ensure it does not conflict with the
-// task manager.
-chrome.experimental.processes.onUpdated.addListener(function(processes) {
-  console.log("Received update.");
-});
-
-// Add a second listener to onUpdated to ensure the task manager only hears
-// about one extension listener per process.
-chrome.experimental.processes.onUpdated.addListener(function(processes) {
-  console.log("Second listener received update.");
-});
-
-chrome.test.sendMessage("ready");
-</script>
+<!--
+ * 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.
+-->
+<script src="background.js"></script>