/usr/share/ is in libxcomposite-dev 1:0.4.4-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libxcomposite-dev/
/usr/share/doc/libxcomposite-dev/changelog.Debian.gz
/usr/share/doc/libxcomposite-dev/changelog.gz
/usr/share/doc/libxcomposite-dev/copyright
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/Xcomposite.3.gz
/usr/share/man/man3/XCompositeCreateRegionFromBorderClip.3.gz
/usr/share/man/man3/XCompositeGetOverlayWindow.3.gz
/usr/share/man/man3/XCompositeNameWindowPixmap.3.gz
/usr/share/man/man3/XCompositeQueryExtension.3.gz
/usr/share/man/man3/XCompositeQueryVersion.3.gz
/usr/share/man/man3/XCompositeRedirectSubwindows.3.gz
/usr/share/man/man3/XCompositeRedirectWindow.3.gz
/usr/share/man/man3/XCompositeReleaseOverlayWindow.3.gz
/usr/share/man/man3/XCompositeUnredirectSubwindows.3.gz
/usr/share/man/man3/XCompositeUnredirectWindow.3.gz
/usr/share/man/man3/XCompositeVersion.3.gz