Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/cross_origin_xhr/content_script/test.html

-<script>
-// Tab where the content script has been injected.
-var testTabId;
-
-chrome.test.getConfig(function(config) {
-
-  function rewriteURL(url) {
-    return url.replace(/PORT/, config.testServer.port);
-  }
-
-  function doReq(domain, expectSuccess) {
-    var url = rewriteURL(domain + ':PORT/files/extensions/test_file.txt');
-
-    chrome.tabs.sendRequest(testTabId, url, function(response) {
-      if (expectSuccess) {
-        chrome.test.assertEq('load', response.event);
-        chrome.test.assertEq(200, response.status);
-        chrome.test.assertEq('Hello!', response.text);
-      } else {
-        chrome.test.assertEq(0, response.status);
-      }
-
-      chrome.test.runNextTest();
-    });
-  }
-
-  chrome.tabs.create({
-      url: rewriteURL('http://localhost:PORT/files/extensions/test_file.html')},
-      function(tab) {
-        testTabId = tab.id;
-      });
-
-  chrome.extension.onRequest.addListener(function(message) {
-    chrome.test.assertEq('injected', message);
-
-    chrome.test.runTests([
-      function allowedOrigin() {
-        doReq('http://a.com', true);
-      },
-      function diallowedOrigin() {
-        doReq('http://c.com', false);
-      },
-      function allowedSubdomain() {
-        doReq('http://foo.b.com', true);
-      },
-      function noSubdomain() {
-        doReq('http://b.com', true);
-      },
-      function disallowedSubdomain() {
-        doReq('http://foob.com', false);
-      },
-      function disallowedSSL() {
-        doReq('https://a.com', false);
-      },
-      function targetPageAlwaysAllowed() {
-        // Even though localhost does not show up in the host permissions, we
-        // can still make requests to it since it's the page that the content
-        // script is injected into.
-        doReq('http://localhost', true);
-      }
-    ]);
-  });
-});
-
-</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="test.js"></script>