/usr/share/gtk-doc/html/ is in libgupnp-av-doc 0.12.5-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/gupnp-av/
/usr/share/gtk-doc/html/gupnp-av/GUPnPCDSLastChangeParser.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteContainer.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteContributor.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteDescriptor.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteItem.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteObject.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteParser.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteResource.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPDIDLLiteWriter.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPFeature.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPFeatureListParser.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPLastChangeParser.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPMediaCollection.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPProtocolInfo.html
/usr/share/gtk-doc/html/gupnp-av/GUPnPSearchCriteriaParser.html
/usr/share/gtk-doc/html/gupnp-av/annotation-glossary.html
/usr/share/gtk-doc/html/gupnp-av/ch01.html
/usr/share/gtk-doc/html/gupnp-av/ch02.html
/usr/share/gtk-doc/html/gupnp-av/gupnp-av-Error-codes.html
/usr/share/gtk-doc/html/gupnp-av/gupnp-av-GUPnPDIDLLiteCreateClass.html
/usr/share/gtk-doc/html/gupnp-av/gupnp-av.devhelp2
/usr/share/gtk-doc/html/gupnp-av/home.png
/usr/share/gtk-doc/html/gupnp-av/index.html
/usr/share/gtk-doc/html/gupnp-av/index.sgml
/usr/share/gtk-doc/html/gupnp-av/left.png
/usr/share/gtk-doc/html/gupnp-av/right.png
/usr/share/gtk-doc/html/gupnp-av/style.css
/usr/share/gtk-doc/html/gupnp-av/up.png