Support shortcuts to output custom string

I would like Ctrl-Shift-Backspace to work in Emacs, which is the default shortcut for the kill-whole-line command. I understand that there is no standard for sending Ctrl-Shift-Backspace, but with other xterms such as urxvt it's possible to configure a custom sequence and have Emacs pick that up. eg.

In .Xresources:

URxvt.keysym.Control-Shift-BackSpace: \033[27;6;15~

and in .emacs:

(define-key input-decode-map "\e[27;6;15~" [C-S-backspace])

AFAICT it's not possible to do this in Terminator, so I have to remap the command to a different shortcut.