[Files.app a11y] Add missing a11y labels into buttons

chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc

Index: chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc
diff --git a/chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc b/chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc
index 1d397d2649f1f00232ef592106fc52251effdcd3..cfa869450f9f65ed2957962c47d369ba9813d5a0 100644
--- a/chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc
+++ b/chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc
@@ -484,7 +484,12 @@ bool FileManagerPrivateGetStringsFunction::RunSync() {
   SET_STRING("SEARCH_NO_MATCHING_FILES_HTML",
              IDS_FILE_BROWSER_SEARCH_NO_MATCHING_FILES_HTML);
   SET_STRING("SEARCH_TEXT_LABEL", IDS_FILE_BROWSER_SEARCH_TEXT_LABEL);
+  SET_STRING("TASKS_BUTTON_LABEL", IDS_FILE_BROWSER_TASKS_BUTTON_LABEL);
   SET_STRING("SHARE_BUTTON_LABEL", IDS_FILE_BROWSER_SHARE_BUTTON_LABEL);
+  SET_STRING("CHANGE_TO_LISTVIEW_BUTTON_LABEL",
+             IDS_FILE_BROWSER_CHANGE_TO_LISTVIEW_BUTTON_LABEL);
+  SET_STRING("CHANGE_TO_THUMBNAILVIEW_BUTTON_LABEL",
+             IDS_FILE_BROWSER_CHANGE_TO_THUMBNAILVIEW_BUTTON_LABEL);
   SET_STRING("CANCEL_SELECTION_BUTTON_LABEL",
              IDS_FILE_BROWSER_CANCEL_SELECTION_BUTTON_LABEL);
   SET_STRING("SHARE_ERROR", IDS_FILE_BROWSER_SHARE_ERROR);