[Files.app] Added a tabindex test for save file dialog

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

Index: chrome/browser/chromeos/file_manager/file_manager_browsertest.cc
diff --git a/chrome/browser/chromeos/file_manager/file_manager_browsertest.cc b/chrome/browser/chromeos/file_manager/file_manager_browsertest.cc
index eb803ec2ebf211b10dd8e2fb04aef348b58930ec..8e1d1185c0346737c20a35d99fddb3225894b5ae 100644
--- a/chrome/browser/chromeos/file_manager/file_manager_browsertest.cc
+++ b/chrome/browser/chromeos/file_manager/file_manager_browsertest.cc
@@ -1169,6 +1169,14 @@ INSTANTIATE_TEST_CASE_P(
         TestParameter(NOT_IN_GUEST_MODE, "tabindexOpenDialogDownloads"),
         TestParameter(IN_GUEST_MODE, "tabindexOpenDialogDownloads")));
 
+INSTANTIATE_TEST_CASE_P(
+    TabindexSaveFileDialog,
+    FileManagerBrowserTest,
+    ::testing::Values(
+        TestParameter(NOT_IN_GUEST_MODE, "tabindexSaveFileDialogDrive"),
+        TestParameter(NOT_IN_GUEST_MODE, "tabindexSaveFileDialogDownloads"),
+        TestParameter(IN_GUEST_MODE, "tabindexSaveFileDialogDownloads")));
+
 // Fails on official build. http://crbug.com/429294
 // Disabled under MSAN as well. http://crbug.com/468980.
 #if !defined(NDEBUG) || defined(OFFICIAL_BUILD) || defined(MEMORY_SANITIZER)