[webkit-dev] Do we need a "webkitBackground" property for XMLHttpRequest?

[xuewen]

When we send XMLHttpRequest  to access search engines or it is sent from 
chrome extensions,  we may do/don't want the browser to show the 
authentication challenge dialog. Should we provide a property to give a 
choice to users such as the "webkitBackground"?

Please see the bug https://bugs.webkit.org/show_bug.cgi?id=91964

If we totally disable XHR popping up the challenge dialogs, then how can 
the user request the resource using XHR from the sites across origins 
and requiring authentications? Or will this operation be disallowed in 
the future?

One way is to show a form by javascript to ask for the credentials in 
its "onReadyStatusChange" and resend it by XHR. Is this the reason to 
totally disable the XHR popping up challenge dialogs?

Sean Wang
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