/usr/share/kde4/apps/plasma/layout-templates/org.kde.plasma-desktop.SaL/contents/layout.js is in plasma-desktop 4:4.8.5-0ubuntu0.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | var activity = new Activity("sal")
activity.name = i18n("Search and Launch")
|