/usr/share/kde4/apps/plasma/ is in kde-workspace-data 4:4.8.2a-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kde4/apps/plasma/plasmoids/
/usr/share/kde4/apps/plasma/plasmoids/notifier/
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/config/
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/config/main.xml
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/ActionItem.qml
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/DeviceItem.qml
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/StatusBar.qml
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/config.ui
/usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/devicenotifier.qml
/usr/share/kde4/apps/plasma/plasmoids/notifier/metadata.desktop
/usr/share/kde4/apps/plasma/services/
/usr/share/kde4/apps/plasma/services/hotplug.operations
/usr/share/kde4/apps/plasma/services/powermanagementservice.operations
/usr/share/kde4/apps/plasma/services/soliddevice.operations