Extend Enyo's XHR support to include anonymous flag

Description

http://xhr.spec.whatwg.org/#anonymous-flag

This is a new flag, proposed for the XHR object, that tells the browser to make an anonymous request.

We should support this in some way as an AjaxProperties flag, and also map it to mozAnon and mozSystem for Firefox OS support.

Environment

all (esp Firefox OS)

Status

Assignee

Screener (Enyo Team)

Reporter

Ben Combee (Enyo Team)

Labels

External issue ID

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Old Issue Key

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Components

Affects versions

Priority

None
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