/usr/include/ is in libgoocanvas-dev 1.0.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/goocanvas-1.0/
/usr/include/goocanvas-1.0/goocanvaswidget.h
/usr/include/goocanvas-1.0/goocanvasrect.h
/usr/include/goocanvas-1.0/goocanvaspath.h
/usr/include/goocanvas-1.0/goocanvaspolyline.h
/usr/include/goocanvas-1.0/goocanvas.h
/usr/include/goocanvas-1.0/goocanvastable.h
/usr/include/goocanvas-1.0/goocanvasmarshal.h
/usr/include/goocanvas-1.0/goocanvasitemmodel.h
/usr/include/goocanvas-1.0/goocanvasellipse.h
/usr/include/goocanvas-1.0/goocanvasenumtypes.h
/usr/include/goocanvas-1.0/goocanvasutils.h
/usr/include/goocanvas-1.0/goocanvasitem.h
/usr/include/goocanvas-1.0/goocanvasgrid.h
/usr/include/goocanvas-1.0/goocanvasstyle.h
/usr/include/goocanvas-1.0/goocanvasgroup.h
/usr/include/goocanvas-1.0/goocanvasimage.h
/usr/include/goocanvas-1.0/goocanvastext.h
/usr/include/goocanvas-1.0/goocanvasitemsimple.h