Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/content_scripts/isolated_world1/background.html

-<script>
-chrome.extension.onConnect.addListener(function(port) {
-  chrome.test.log("got connect");
-  port.onMessage.addListener(function(msg) {
-    chrome.test.log("got message: " + msg);
-    chrome.test.assertEq(2, msg);
-    chrome.test.notifyPass();
-  });
-});
-
-chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
-  chrome.test.log("Got update event: " + JSON.stringify(changeInfo));
-  if (changeInfo.status == "complete") {
-    chrome.tabs.executeScript(tabId, {file: "c.js"});
-    chrome.tabs.onUpdated.removeListener(arguments.callee);
-  }
-});
-
-chrome.test.getConfig(function(config) {
-  chrome.test.log("Creating tab...");
-  chrome.tabs.create({
-    url: "http://localhost:PORT/files/extensions/test_file.html"
-             .replace(/PORT/, config.testServer.port)
-  });
-});
-
-</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>