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

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

 // Copyright (c) 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';
 
 /**
  * Extension ID of Files.app.
  * @type {string}
  * @const
@@ skipping 554 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')
 };
 
 /**
  * Basic entry set for the local volume.
  * @type {Array.<TestEntryInfo>}
  * @const
@@ skipping 220 matching lines @@
         chrome.test.fail(testCaseName + ' is not found.');
         return;
       }
       // Specify the name of test to the test system.
       targetTest.generatedName = testCaseName;
       chrome.test.runTests([targetTest]);
     }
   ];
   steps.shift()();
 });