title: tab.create was changed? how avoid chrome popup extension to close
body: <p>in my extension, there is a option that to close or unclose popover on clicked a URL.</p>
  
  <pre><code>    chrome.tabs.create( {
          url : turl
      });
      if (!settings.get("lockPopover")) {
          window.close();
      }
  </code></pre>
  
  <p>in the latest version chrome v20, it dont work. popover was closed all time.
  how to avoid this.</p>