add token support (same as i18n-menupath-raw in d6 version)

In source code we have old d6 function versions

/**
* Implementation of hook_token_list().
*/
function i18n_menunode_token_list($type = 'all') {
if ($type == 'node' || $type == 'all') {
$tokens['node']['i18n-menupath-raw'] = t("The unfiltered menu path (as reflected in the breadcrumb), not including Home or [menu]. Separated by /.");
return $tokens;
}
}

/**
* Implementation of hook_token_values().
*/
function i18n_menunode_token_values($type, $node = NULL, $options = array()) {
$values = array();

if ($type == 'node') {
$trail_raw = array();
$item = FALSE;

// If the current node has no menu item we use the source node one.
if (empty($node->menu['mlid'])) {
$tnid = _i18n_menunode_get_node_tnid($node);
if (!empty($tnid) && $tnid != $node->nid ) {
$tnode = (object) array('nid' => $tnid);
//_i18n_menunode_prepare($tnode);
menu_node_prepare($tnode);
// We use the source node menu item only if node translation is enabled.
$item = !empty($tnode->menu['mlid']) && i18n_menunode_enabled($tnode->menu) ? $tnode->menu : FALSE;
}
}
else {
$item = $node->menu;
}

while ($item) {
array_unshift($trail_raw, _i18nmenu_get_item_title($item, FALSE, $node->language));
$item = empty($item['plid']) ? FALSE : menu_link_load($item['plid']);
}

$values['i18n-menupath-raw'] = !empty($options['pathauto']) ? $trail_raw : implode('/', $trail_raw);
}

return $values;
}

What we need to change to make it works in d7??