title: Using chrome.downloads.download, is it possible to make the file not popup the download bar?
body: <p>When I executed <a href="https://developer.chrome.com/extensions/downloads#method-download" rel="nofollow">chrome.downloads.download</a>, it downloads the file and popups up the download bar at the bottom and shows it, can I suppress it?</p>
  
  <p>Example:</p>
  
  <pre><code>/* some code to suppress download bar */
  
  chrome.downloads.download(
    { "url": request.ImageToDownload },
    function (downloadId){
      // ...
    }
  );
  </code></pre>