/usr/include/qt5/Qt3D/5.2.0/ is in qt3d5-private-dev 5.0~git20130731-0ubuntu5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qt5/Qt3D/5.2.0/Qt3D/
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/ailoaderiostream_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/ailoaderiosystem_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qailoader_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qaimesh_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qaiscene_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qaiscenehandler_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglabstracteffect_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglbuilder_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglcolladafxeffect_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglcontextsurface_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qgldrawbuffersurface_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglext_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglflatcoloreffect_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglflattextureeffect_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qgllitmaterialeffect_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qgllittextureeffect_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglmaskedsurface_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglmaterial_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglmockview_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglpainter_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglpaintersurface_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglpickcolors_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglscenenode_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglsection_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglteapot_data_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qgltexture2d_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qgltextureutils_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qglvertexbundle_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qmatrix4x4stack_p.h
/usr/include/qt5/Qt3D/5.2.0/Qt3D/private/qvector_utils_p.h