/usr/share/php/Icinga/Chart/ is in php-icinga 2.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Icinga/Chart/Axis.php
/usr/share/php/Icinga/Chart/Chart.php
/usr/share/php/Icinga/Chart/Format.php
/usr/share/php/Icinga/Chart/Graph/
/usr/share/php/Icinga/Chart/Graph/BarGraph.php
/usr/share/php/Icinga/Chart/Graph/LineGraph.php
/usr/share/php/Icinga/Chart/Graph/StackedGraph.php
/usr/share/php/Icinga/Chart/Graph/Tooltip.php
/usr/share/php/Icinga/Chart/GridChart.php
/usr/share/php/Icinga/Chart/Inline/
/usr/share/php/Icinga/Chart/Inline/Inline.php
/usr/share/php/Icinga/Chart/Inline/PieChart.php
/usr/share/php/Icinga/Chart/Legend.php
/usr/share/php/Icinga/Chart/Palette.php
/usr/share/php/Icinga/Chart/PieChart.php
/usr/share/php/Icinga/Chart/Primitive/
/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
/usr/share/php/Icinga/Chart/Render/
/usr/share/php/Icinga/Chart/Render/LayoutBox.php
/usr/share/php/Icinga/Chart/Render/RenderContext.php
/usr/share/php/Icinga/Chart/Render/Rotator.php
/usr/share/php/Icinga/Chart/SVGRenderer.php
/usr/share/php/Icinga/Chart/Unit/
/usr/share/php/Icinga/Chart/Unit/AxisUnit.php
/usr/share/php/Icinga/Chart/Unit/CalendarUnit.php
/usr/share/php/Icinga/Chart/Unit/LinearUnit.php
/usr/share/php/Icinga/Chart/Unit/LogarithmicUnit.php
/usr/share/php/Icinga/Chart/Unit/StaticAxis.php