[Files.app] Add a test to check tabfocus

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

 // Copyright (c) 2013 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.
 
 // Browser test for basic Chrome OS file manager functionality:
 //  - The file list is updated when a file is added externally to the Downloads
 //    folder.
 //  - Selecting a file and copy-pasting it with the keyboard copies the file.
 //  - Selecting a file and pressing delete deletes it.
 
@@ skipping 1082 matching lines @@
     FileManagerBrowserTest,
     ::testing::Values(
         TestParameter(NOT_IN_GUEST_MODE, "traverseFolderShortcuts"),
         TestParameter(NOT_IN_GUEST_MODE, "addRemoveFolderShortcuts")));
 
 INSTANTIATE_TEST_CASE_P(
     TabIndex,
     FileManagerBrowserTest,
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE, "searchBoxFocus")));
 
+INSTANTIATE_TEST_CASE_P(TabindexFocus,
+                        FileManagerBrowserTest,
+                        ::testing::Values(TestParameter(NOT_IN_GUEST_MODE,
+                                                        "tabindexFocus")));
+
+INSTANTIATE_TEST_CASE_P(
+    TabindexFocusDirectorySelected,
+    FileManagerBrowserTest,
+    ::testing::Values(TestParameter(NOT_IN_GUEST_MODE,
+                                    "tabindexFocusDirectorySelected")));
+
 // Fails on official build. http://crbug.com/429294
 #if !defined(NDEBUG) || defined(OFFICIAL_BUILD)
 #define MAYBE_OpenFileDialog DISABLED_OpenFileDialog
 #else
 #define MAYBE_OpenFileDialog OpenFileDialog
 #endif
 WRAPPED_INSTANTIATE_TEST_CASE_P(
     MAYBE_OpenFileDialog,
     FileManagerBrowserTest,
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE,
@@ skipping 357 matching lines @@
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(VideoPlayerBrowserTest, OpenSingleVideoOnDrive) {
   set_test_case_name("openSingleVideoOnDrive");
   StartTest();
 }
 
 }  // namespace
 }  // namespace file_manager