title: Chrome fails to show http authentication window
body: <p>I am developing a Drupal site, within which is a page with an iframe, displaying an external SQL Reporting server driven site.</p>
  
  <p>This iframed site is protected on by HTTP authentication. In <strong>all</strong> browsers, apart from Chrome, when the page is viewed, the browser driven login box pops up.</p>
  
  <p>In Chrome (Windows &amp; OS X), no login box appears and I get an immediate 401 error from the SQL Reporting Server. I've cleared cache's and even tried on a fresh chrome installation on a VM.</p>
  
  <p>The above method works fine on the clients existing live site, which is ASP driven. Other than CMS technology, the only other obvious difference is domains. </p>
  
  <p>The working live site is referencing a sub domain of itself in the iframe. The development site is referencing a completely different domain.</p>
  
  <p>I've tried <code>/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome -–allow-cross-origin-auth-prompt</code>, which seems to make no difference.</p>
  
  <p>Does Chrome have much tighter cross domain login rules? Or am I missing something else?</p>