Method DeleteDir

src/leveldb/util/env_windows.cc:539–545

  }

  Status DeleteDir(const std::string& dirname) override {
    auto wDirname = toUtf16(dirname);
    if (!::RemoveDirectoryW(wDirname.c_str())) {
      return WindowsError(dirname, ::GetLastError());
    }
    return Status::OK();
  }

  Status GetFileSize(const std::string& filename, uint64_t* size) override {
    WIN32_FILE_ATTRIBUTE_DATA file_attributes;