Change directory if the active list item on navigation list is changed.

chrome/test/data/extensions/api_test/file_manager_browsertest/test_util.js

 // Copyright 2014 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.
 
 'use strict';
 
 /**
  * Sends a test message.
  * @param {Object} message Message to be sent. It is converted into JSON string
  *     before sending.
@@ skipping 245 matching lines @@
   directoryB: new TestEntryInfo(
       EntryType.DIRECTORY, null, 'A/B',
       null, SharedOption.NONE, 'Jan 1, 2000 1:00 AM',
       'B', '--', 'Folder'),
 
   directoryC: new TestEntryInfo(
       EntryType.DIRECTORY, null, 'A/B/C',
       null, SharedOption.NONE, 'Jan 1, 2000 1:00 AM',
       'C', '--', 'Folder'),
 
+  directoryD: new TestEntryInfo(
+      EntryType.DIRECTORY, null, 'D',
+      null, SharedOption.NONE, 'Jan 1, 2000 1:00 AM',
+      'D', '--', 'Folder'),
+
+  directoryE: new TestEntryInfo(
+      EntryType.DIRECTORY, null, 'D/E',
+      null, SharedOption.NONE, 'Jan 1, 2000 1:00 AM',
+      'E', '--', 'Folder'),
+
+  directoryF: new TestEntryInfo(
+      EntryType.DIRECTORY, null, 'D/E/F',
+      null, SharedOption.NONE, 'Jan 1, 2000 1:00 AM',
+      'F', '--', 'Folder'),
+
   zipArchive: new TestEntryInfo(
       EntryType.FILE, 'archive.zip', 'archive.zip',
       'application/x-zip', SharedOption.NONE, 'Jan 1, 2014 1:00 AM',
       'archive.zip', '533 bytes', 'Zip archive')
 };