Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/content_scripts/extension_iframe/iframe.html

Index: chrome/test/data/extensions/api_test/content_scripts/extension_iframe/iframe.html
===================================================================
--- chrome/test/data/extensions/api_test/content_scripts/extension_iframe/iframe.html	(revision 111763)
+++ chrome/test/data/extensions/api_test/content_scripts/extension_iframe/iframe.html	(working copy)
@@ -1,14 +1,6 @@
-<script>
-// Simple success test: we want content-script APIs to be available (like
-// sendRequest), but other APIs to be undefined.
-var success = false;
-
-try {
-  var foo = chrome.tabs.create;
-} catch (e) {
-  success = e.message.indexOf(
-      " can only be used in extension processes.") > -1;
-}
-
-chrome.extension.sendRequest({success: success});
-</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="iframe.js"></script>