Chrome sends cookie with requests
Chrome sends the cookies set by the website with the requests you make using REST Console, for example if you are logged in to example.com and you try to make some requests to its RESTful API using REST Console, chrome will send the cookie set by example.com with each request.
There is no way to manipulate cookies in Chrome on an XMLHttpRequest yet ... perhaps there is something that can be done in their "native client" SDK ... but I cant see anything yet.
on a separate note, I think we're related :)
In some use cases it's desirable for Chrome to send such cookies. For example, certain scenarios with enterprise web access management tools where an existing authenticated session is assumed to be in place (represented by such cookie). Ideally, there would be a plugin option to send or not send.