Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/content_settings/getresourceidentifiers/test.html

-<script>
-// Content settings API test
-// Run with browser_tests
-//     --gtest_filter=ExtensionApiTest.ContentSettingsGetResourceIdentifiers
-
-Object.prototype.forEach = function(f) {
-  for (key in this) {
-    if (this.hasOwnProperty(key))
-      f(key, this[key]);
-  }
-}
-
-var cs = chrome.contentSettings;
-chrome.test.runTests([
-  function getResourceIdentifiers() {
-    var contentTypes = {
-      "cookies": undefined,
-      "images": undefined,
-      "javascript": undefined,
-      "plugins": [
-        {
-          "description": "Foo",
-          "id": "foo",
-        },
-        {
-          "description": "Bar Plugin",
-          "id": "bar.plugin",
-        },
-      ],
-      "popups": undefined,
-      "notifications": undefined
-    };
-    contentTypes.forEach(function(type, identifiers) {
-      cs[type].getResourceIdentifiers(chrome.test.callbackPass(function(value) {
-        chrome.test.assertEq(identifiers, value);
-      }));
-    });
-  },
-]);
-</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>