Continuing with the Milestone 1 stuff one important breaking change has come.
The XMLHttpRequest will be renamed to HttpRequest.
Oficial note can be readed here:
In the near future I will be landing a change that renames
XMLHttpRequest (and the associated names like XMLHttpRequestException)
So in the future, when you want to make an XHR request in dart, you
only need to use the shortened “HttpRequest.”