Move another set of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/tabs/basics/relative.js

Index: chrome/test/data/extensions/api_test/tabs/basics/relative.js
===================================================================
--- chrome/test/data/extensions/api_test/tabs/basics/relative.js	(revision 0)
+++ chrome/test/data/extensions/api_test/tabs/basics/relative.js	(revision 0)
@@ -0,0 +1,11 @@
+// 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.
+
+window.onload = function() {
+  chrome.extension.getViews({type:"tab"}).forEach(function(view) {
+    if (view.relativePageLoaded) {
+      view.relativePageLoaded();
+    }
+  });
+}