/usr/share/php/Icinga/Chart/Primitive/ is in php-icinga 2.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Icinga/Chart/Primitive/Animatable.php
/usr/share/php/Icinga/Chart/Primitive/Animation.php
/usr/share/php/Icinga/Chart/Primitive/Canvas.php
/usr/share/php/Icinga/Chart/Primitive/Circle.php
/usr/share/php/Icinga/Chart/Primitive/Drawable.php
/usr/share/php/Icinga/Chart/Primitive/Line.php
/usr/share/php/Icinga/Chart/Primitive/Path.php
/usr/share/php/Icinga/Chart/Primitive/PieSlice.php
/usr/share/php/Icinga/Chart/Primitive/RawElement.php
/usr/share/php/Icinga/Chart/Primitive/Rect.php
/usr/share/php/Icinga/Chart/Primitive/Styleable.php
/usr/share/php/Icinga/Chart/Primitive/Text.php