Add warning message to downloads directory

chrome/browser/extensions/extension_file_browser_private_api.cc

Index: chrome/browser/extensions/extension_file_browser_private_api.cc
diff --git a/chrome/browser/extensions/extension_file_browser_private_api.cc b/chrome/browser/extensions/extension_file_browser_private_api.cc
index 826e2cf7b7ca54ff7cf52c0f6e2d34c1a1be4061..b2fbc812dee279bf3152476bbbb5dce7b2666357 100644
--- a/chrome/browser/extensions/extension_file_browser_private_api.cc
+++ b/chrome/browser/extensions/extension_file_browser_private_api.cc
@@ -1386,6 +1386,8 @@ bool FileDialogStringsFunction::RunImpl() {
   SET_STRING(IDS_FILE_BROWSER, DATE_COLUMN_LABEL);
   SET_STRING(IDS_FILE_BROWSER, PREVIEW_COLUMN_LABEL);
 
+  SET_STRING(IDS_FILE_BROWSER, DOWNLOADS_DIRECTORY_WARNING);
+
   SET_STRING(IDS_FILE_BROWSER, ERROR_CREATING_FOLDER);
   SET_STRING(IDS_FILE_BROWSER, ERROR_INVALID_CHARACTER);
   SET_STRING(IDS_FILE_BROWSER, ERROR_RESERVED_NAME);