/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/PerformanceMetrics/qmldir is in qml-module-ubuntu-performancemetrics 1.3.1918+16.04.20160404-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | module Ubuntu.PerformanceMetrics
plugin UbuntuPerformanceMetrics
PerformanceOverlay 0.1 PerformanceOverlay.qml
internal BarGraph BarGraph.qml
#version 1.0
PerformanceOverlay 1.0 PerformanceOverlay.qml
|