/usr/lib/qt4/examples/dbus/ is in qt4-demos 4:4.8.7+dfsg-5ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/qt4/examples/dbus/chat/
/usr/lib/qt4/examples/dbus/chat/chat.cpp
/usr/lib/qt4/examples/dbus/chat/chat.h
/usr/lib/qt4/examples/dbus/chat/chat_adaptor.cpp
/usr/lib/qt4/examples/dbus/chat/chat_adaptor.h
/usr/lib/qt4/examples/dbus/chat/chat_interface.cpp
/usr/lib/qt4/examples/dbus/chat/chat_interface.h
/usr/lib/qt4/examples/dbus/chat/chatmainwindow.ui
/usr/lib/qt4/examples/dbus/chat/chatsetnickname.ui
/usr/lib/qt4/examples/dbus/chat/com.trolltech.chat.xml
/usr/lib/qt4/examples/dbus/chat/dbus-chat
/usr/lib/qt4/examples/dbus/chat/dbus-chat.pro
/usr/lib/qt4/examples/dbus/complexpingpong/
/usr/lib/qt4/examples/dbus/complexpingpong/complexping
/usr/lib/qt4/examples/dbus/complexpingpong/complexping.cpp
/usr/lib/qt4/examples/dbus/complexpingpong/complexping.h
/usr/lib/qt4/examples/dbus/complexpingpong/complexping.pro
/usr/lib/qt4/examples/dbus/complexpingpong/complexpingpong.pro
/usr/lib/qt4/examples/dbus/complexpingpong/complexpong
/usr/lib/qt4/examples/dbus/complexpingpong/complexpong.cpp
/usr/lib/qt4/examples/dbus/complexpingpong/complexpong.h
/usr/lib/qt4/examples/dbus/complexpingpong/complexpong.pro
/usr/lib/qt4/examples/dbus/complexpingpong/ping-common.h
/usr/lib/qt4/examples/dbus/dbus.pro
/usr/lib/qt4/examples/dbus/listnames/
/usr/lib/qt4/examples/dbus/listnames/listnames
/usr/lib/qt4/examples/dbus/listnames/listnames.cpp
/usr/lib/qt4/examples/dbus/listnames/listnames.pro
/usr/lib/qt4/examples/dbus/pingpong/
/usr/lib/qt4/examples/dbus/pingpong/ping
/usr/lib/qt4/examples/dbus/pingpong/ping-common.h
/usr/lib/qt4/examples/dbus/pingpong/ping.cpp
/usr/lib/qt4/examples/dbus/pingpong/ping.pro
/usr/lib/qt4/examples/dbus/pingpong/pingpong.pro
/usr/lib/qt4/examples/dbus/pingpong/pong
/usr/lib/qt4/examples/dbus/pingpong/pong.cpp
/usr/lib/qt4/examples/dbus/pingpong/pong.h
/usr/lib/qt4/examples/dbus/pingpong/pong.pro
/usr/lib/qt4/examples/dbus/remotecontrolledcar/
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car.cpp
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car.h
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car.pro
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car.xml
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car_adaptor.cpp
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/car_adaptor.h
/usr/lib/qt4/examples/dbus/remotecontrolledcar/car/main.cpp
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/car.xml
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/car_interface.cpp
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/car_interface.h
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/controller
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/controller.cpp
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/controller.h
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/controller.pro
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/controller.ui
/usr/lib/qt4/examples/dbus/remotecontrolledcar/controller/main.cpp
/usr/lib/qt4/examples/dbus/remotecontrolledcar/remotecontrolledcar.pro