Move another block of extension tests to manifest_version 2.

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

-<script>
-var last_file_entries = null;
-
-function getLastFileEntries() {
-  return last_file_entries;
-}
-
-function executeListener(id, details) {
-  if (id != "TextAction" && id != "BaseAction" && id != "JpegAction") {
-    chrome.test.fail("Unexpected action id: " + id);
-    return;
-  }
-  var file_entries = details.entries;
-  if (!file_entries || file_entries.length != 1) {
-    chrome.test.fail("Unexpected file url list");
-    return;
-  }
-  last_file_entries = file_entries;
-  chrome.tabs.get(details.tab_id, function(tab) {
-    if (tab.title != "file browser component test") {
-      chrome.test.fail("Unexpected tab title: " + tab.title);
-      return;
-    }
-    // Create a new tab
-    chrome.tabs.create({
-      url: "tab.html"
-    });
-  });
-}
-
-chrome.fileBrowserHandler.onExecute.addListener(executeListener);
-
-// This extension just initializes its chrome.fileBrowserHandler.onExecute
-// event listener, the real testing is done when this extension's handler is
-// invoked from filebrowser_component tests. This event will be raised from that
-// component extension test and it simulates user action in the file browser.
-// tab.html part of this extension can run only after the component raises this
-// event, since that operation sets the propery security context and creates
-// event's payload with proper file Entry instances. tab.html will return
-// results of its execution to filebrowser_component test through a
-// cross-component message.
-chrome.test.succeed();
-
-</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>