Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/content_scripts/css_l10n/background.html

-<script>
-
-var firstEnter = true;
-
-chrome.test.getConfig(function(config) {
-  chrome.test.log('Creating tab...');
-
-  var URL = 'http://localhost:PORT/files/extensions/test_file_with_body.html';
-  var TEST_FILE_URL = URL.replace(/PORT/, config.testServer.port);
-
-  chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
-    if (changeInfo.status != 'complete')
-      return;
-    if (!firstEnter)
-      return;
-    firstEnter = false;
-
-    // We need to test two different paths, because the message bundles used
-    // for localization are loaded differently in each case:
-    //   (1) localization upon loading extension scripts
-    //   (2) localization upon injecting CSS with JavaScript
-    chrome.test.runTests([
-
-    // Tests that CSS loaded automatically from the files specified in the
-    // manifest has had __MSG_@@extension_id__ replaced with the actual
-    // extension id.
-    function extensionIDMessageGetsReplacedInContentScriptCSS() {
-      chrome.extension.onRequest.addListener(
-        function(request, sender, sendResponse) {
-          if (request.tag == 'extension_id') {
-            if (request.message == 'passed') {
-              chrome.test.succeed();
-            } else {
-              chrome.test.fail(request.message);
-            }
-          }
-        }
-      );
-      var script_file = {};
-      script_file.file = 'test_extension_id.js';
-      chrome.tabs.executeScript(tabId, script_file);
-    },
-
-    // First injects CSS into the page through chrome.tabs.insertCSS and then
-    // checks that it has had __MSG_text_color__ replaced with the correct
-    // message value.
-    function textDirectionMessageGetsReplacedInInsertCSSCall() {
-      chrome.extension.onRequest.addListener(
-        function(request, sender, sendResponse) {
-          if (request.tag == 'paragraph_style') {
-            if (request.message == 'passed') {
-              chrome.test.succeed();
-            } else {
-              chrome.test.fail(request.message);
-            }
-          }
-        }
-      );
-      var css_file = {};
-      css_file.file = 'test.css';
-      chrome.tabs.insertCSS(tabId, css_file, function() {
-        var script_file = {};
-        script_file.file = 'test_paragraph_style.js';
-        chrome.tabs.executeScript(tabId,script_file);
-      });
-    }
-
-    ]);
-  });
-
-  chrome.tabs.create({ url: TEST_FILE_URL });
-});
-
-</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>