/usr/ is in libmircommon-dev 0.26.3+16.04.20170605-0ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/mircommon/
/usr/include/mircommon/mir/
/usr/include/mircommon/mir/time/
/usr/include/mircommon/mir/time/types.h
/usr/include/mircommon/mir/time/posix_timestamp.h
/usr/include/mircommon/mir/dispatch/
/usr/include/mircommon/mir/dispatch/multiplexing_dispatchable.h
/usr/include/mircommon/mir/dispatch/dispatchable.h
/usr/include/mircommon/mir/dispatch/threaded_dispatcher.h
/usr/include/mircommon/mir/dispatch/readable_fd.h
/usr/include/mircommon/mir/dispatch/action_queue.h
/usr/include/mircommon/mir/shared_library.h
/usr/include/mircommon/mir/flags.h
/usr/include/mircommon/mir/graphics/
/usr/include/mircommon/mir/graphics/native_buffer.h
/usr/include/mircommon/mir/log.h
/usr/include/mircommon/mir/frontend/
/usr/include/mircommon/mir/frontend/buffer_stream_id.h
/usr/include/mircommon/mir/frontend/surface_id.h
/usr/include/mircommon/mir/cached_ptr.h
/usr/include/mircommon/mir/libname.h
/usr/include/mircommon/mir/uncaught.h
/usr/include/mircommon/mir/logging/
/usr/include/mircommon/mir/logging/logger.h
/usr/include/mircommon/mir/events/
/usr/include/mircommon/mir/events/contact_state.h
/usr/include/mircommon/mir/events/input_device_state.h
/usr/include/mircommon/mir/fd.h
/usr/include/mircommon/mir/module_deleter.h
/usr/include/mircommon/mir/raii.h
/usr/include/mircommon/mir/assert_module_entry_point.h
/usr/include/mircommon/mir/posix_rw_mutex.h
/usr/include/mircommon/mir/input/
/usr/include/mircommon/mir/input/mir_pointer_config.h
/usr/include/mircommon/mir/input/mir_input_config_serialization.h
/usr/include/mircommon/mir/input/mir_input_config.h
/usr/include/mircommon/mir/input/keymap.h
/usr/include/mircommon/mir/input/device_capability.h
/usr/include/mircommon/mir/input/mir_keyboard_config.h
/usr/include/mircommon/mir/input/mir_touchpad_config.h
/usr/include/mircommon/mir/input/mir_touchscreen_config.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libmircommon-dev/
/usr/share/doc/libmircommon-dev/copyright
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/share/doc/libmircommon-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libmircommon.so