Define FilePath::NormalizePathSeparators on all platforms

content/browser/download/download_manager_impl_unittest.cc

Index: content/browser/download/download_manager_impl_unittest.cc
diff --git a/content/browser/download/download_manager_impl_unittest.cc b/content/browser/download/download_manager_impl_unittest.cc
index 3d894f8e881713490ae3d129f19af80e66b6a29e..d7d8964bc3d63605339f130b51eeae1bc47bbdb3 100644
--- a/content/browser/download/download_manager_impl_unittest.cc
+++ b/content/browser/download/download_manager_impl_unittest.cc
@@ -781,11 +781,7 @@ FilePath ExpandFilenameTestPath(const FilePath::CharType* template_path,
                                downloads_dir.value());
   ReplaceSubstringsAfterOffset(&path, 0, FILE_PATH_LITERAL("$alt"),
                                alternate_dir.value());
-  FilePath file_path(path);
-#if defined(FILE_PATH_USES_WIN_SEPARATORS)
-  file_path = file_path.NormalizeWindowsPathSeparators();
-#endif
-  return file_path;
+  return FilePath(path).NormalizePathSeparators();
 }
 
 } // namespace