The sendAsBinary method is non-standard and deprecated. It was only ever

shipped in Firefox, and we used a polyfill on the rest of our platforms.
The correct way of doing this is the Blob version of XMLHttpRequest.send().

This is supported on all the browsers that support Uint8Array (which was used

in the polyfill).

Uploaded a file via drag-and-drop.
Ran js-tests.