Fixes XHR requests to use the username and password supplied from JavaScript

Currently, the browser does not use the credentials supplied from JavaScript.
If a request returns a 401 Unauthorized, the browser always prompts the user.
This violates http://www.w3.org/TR/XMLHttpRequest/#the-send-method

Bug: 2533522
Change-Id: I8e72c1a0be187d193c4ad6b2ca8a624c7ae06fa1
2 files changed