DownloadItemImpl::DownloadItemImpl(
    DownloadItemImplDelegate* delegate,
    const std::string& guid,
    uint32_t download_id,
    const base::FilePath& current_path,
    const base::FilePath& target_path,
    const std::vector<GURL>& url_chain,
    const GURL& referrer_url,
    const GURL& site_url,
    const GURL& tab_url,
    const GURL& tab_refererr_url,
    const std::string& mime_type,
    const std::string& original_mime_type,
    base::Time start_time,
    base::Time end_time,
    const std::string& etag,
    const std::string& last_modified,
    int64_t received_bytes,
    int64_t total_bytes,
    const std::string& hash,
    DownloadItem::DownloadState state,
    DownloadDangerType danger_type,
    DownloadInterruptReason interrupt_reason,
    bool opened,
    base::Time last_access_time,
    bool transient,
    const std::vector<DownloadItem::ReceivedSlice>& received_slices)
    : request_info_(url_chain,
                    referrer_url,
                    site_url,
                    tab_url,
                    tab_refererr_url,
                    std::string(),
                    base::FilePath(),
                    ui::PAGE_TRANSITION_LINK,
                    false,
                    std::string(),
                    start_time),
      guid_(guid),
      download_id_(download_id),
      mime_type_(mime_type),
      original_mime_type_(original_mime_type),
      total_bytes_(total_bytes),
      last_reason_(interrupt_reason),
      start_tick_(base::TimeTicks()),
      state_(ExternalToInternalState(state)),
      danger_type_(danger_type),
      delegate_(delegate),
      opened_(opened),
      last_access_time_(last_access_time),
      transient_(transient),
      destination_info_(target_path,
                        current_path,
                        received_bytes,
                        state == COMPLETE,
                        hash,
                        end_time),
      last_modified_time_(last_modified),
      etag_(etag),
      received_slices_(received_slices),
      is_updating_observers_(false),
      weak_ptr_factory_(this) {
  delegate_->Attach();
  DCHECK(state_ == COMPLETE_INTERNAL || state_ == INTERRUPTED_INTERNAL ||
         state_ == CANCELLED_INTERNAL);
  DCHECK(base::IsValidGUID(guid_));
  Init(false /* not actively downloading */, TYPE_HISTORY_IMPORT);
}

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.