static bool ValidPathForFile(const FilePath::StringType& text,
                             FilePath* full_path) {
  FilePath file_path(text);
  if (!file_util::AbsolutePath(&file_path))
    return false;

  if (!file_util::PathExists(file_path))
    return false;

  *full_path = file_path;
  return true;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.