Move another set of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/stubs/background.html

Index: chrome/test/data/extensions/api_test/stubs/background.html
===================================================================
--- chrome/test/data/extensions/api_test/stubs/background.html	(revision 112170)
+++ chrome/test/data/extensions/api_test/stubs/background.html	(working copy)
@@ -1,18 +1,6 @@
-<script>
-
-chrome.extension.onRequest.addListener(function(msg, sender, responseFunc) {
-  if (msg == "getApi") {
-    responseFunc(chrome.test.getApiDefinitions());
-  } else if (msg == "pass") {
-    chrome.test.notifyPass();
-  } else if (msg.substr(0, 3) == "log") {
-    chrome.test.log(msg);
-  } else {
-    chrome.test.notifyFail("failed");
-  }
-});
-
-// On first install, send a success message so the test can continue.
-chrome.test.notifyPass();
-
-</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>