Comment 24 for bug 927952

To answer my own question, in gnome-control-center git there are slots for *six* keybindings now!
That doesn’t sound like a very thought-out strategy to map six bindings only to avoid that one little dialog.

And, to wit, we don’t have the new gnome-settings-daemon with media-keys, we’re stuck with the old system.

http://git.gnome.org/browse/gnome-control-center/tree/panels/keyboard/01-screenshot.xml.in

<?xml version="1.0" encoding="UTF-8" ?>
<KeyListEntries group="system" schema="org.gnome.settings-daemon.plugins.media-keys" _name="Screenshots">

 <KeyListEntry name="screenshot"
                      _description="Take a screenshot"/>

 <KeyListEntry name="window-screenshot"
                      _description="Take a screenshot of a window"/>

 <KeyListEntry name="area-screenshot"
                      _description="Take a screenshot of an area"/>

 <KeyListEntry name="screenshot-clip"
                      _description="Copy a screenshot to clipboard"/>

 <KeyListEntry name="window-screenshot-clip"
                      _description="Copy a screenshot of a window to clipboard"/>

 <KeyListEntry name="area-screenshot-clip"
                      _description="Copy a screenshot of an area to clipboard"/>

</KeyListEntries>