In Chrome on Windows, I can click and drag from the Download bar, e.g.
Into the editor and it will upload that file.
In Chrome on Mac, I can't.
The editor does detect that there is something being dragged as the message "Drop files here to upload" appears, but nothing happens when the item is dropped.
Presumably it's some sort of handling in Mac OS X that prevents this behaviour from working as expected, but just in case, I thought I would mention it.