Merge "Don't call fdopendir on unique_fd::get."

class DirectoryReader {

 public:

  explicit DirectoryReader(base::unique_fd directory_fd) {

    directory_ = fdopendir(directory_fd.get());

    int fd = directory_fd.release();

    directory_ = fdopendir(fd);

    error_ = errno;

    if (directory_ != nullptr)

      (void) directory_fd.release(); // ignore return result?

    if (directory_ == nullptr)

      close(fd);

  }

  ~DirectoryReader() {