Move a bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/all_urls/content_script/background.js

Index: chrome/test/data/extensions/api_test/all_urls/content_script/background.js
===================================================================
--- chrome/test/data/extensions/api_test/all_urls/content_script/background.js	(revision 0)
+++ chrome/test/data/extensions/api_test/all_urls/content_script/background.js	(revision 0)
@@ -0,0 +1,10 @@
+// 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.
+
+chrome.extension.onRequest.addListener(
+  function(request, sender, sendResponse) {
+    // Let the extension know where the script ran.
+    var url = sender.tab ? sender.tab.url : 'about:blank';
+    chrome.test.sendMessage('content script: ' + url);
+  });