Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/content_scripts/isolated_world2/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.assertTrue(msg);
-    chrome.test.notifyPass();
-  });
-});
-
-chrome.tabs.getAllInWindow(null, function(tabs) {
-  chrome.test.log("Got tabs: " + JSON.stringify(tabs));
-
-  // The last tab is the one that the other extension should have run scripts
-  // in.
-  chrome.tabs.executeScript(tabs.pop().id, {file: "a.js"});
-});
-</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>