/usr/ is in liboxideqtcore-dev 1.21.5-0ubuntu0.16.04.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/oxide-qt/
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqhttpauthenticationrequest.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqfindcontroller.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqwebpreferences.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqdownloadrequest.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqpermissionrequest.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqnewviewrequest.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqloadevent.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqsecuritystatus.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqnavigationrequest.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqcertificateerror.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqwebcontextmenuparams.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqmediacapturedevices.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqglobal.h
/usr/include/x86_64-linux-gnu/oxide-qt/OxideQtCore/oxideqsslcertificate.h
/usr/share/
/usr/share/doc/
/usr/share/doc/liboxideqtcore-dev/
/usr/share/doc/liboxideqtcore-dev/copyright
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/OxideQtCore/
/usr/lib/x86_64-linux-gnu/cmake/OxideQtCore/OxideQtCoreConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/OxideQtCore/OxideQtCoreConfig.cmake
/usr/share/doc/liboxideqtcore-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libOxideQtCore.so