/usr/ is in libgladeui-doc 3.16.1-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/gtk-doc/
/usr/share/gtk-doc/html/
/usr/share/doc/
/usr/share/doc/libgladeui-doc/
/usr/share/doc/libgladeui-doc/README
/usr/share/doc/libgladeui-doc/NEWS.gz
/usr/share/doc/libgladeui-doc/html/
/usr/share/doc/libgladeui-doc/html/GladeEditorProperty.html
/usr/share/doc/libgladeui-doc/html/gladeui-2.devhelp2.gz
/usr/share/doc/libgladeui-doc/html/catalogintro.html
/usr/share/doc/libgladeui-doc/html/core.html
/usr/share/doc/libgladeui-doc/html/index.html
/usr/share/doc/libgladeui-doc/html/gladeui-GladePropertyClass.html
/usr/share/doc/libgladeui-doc/html/widgetclasses.html
/usr/share/doc/libgladeui-doc/html/gladeui-GladeSignalEditor.html
/usr/share/doc/libgladeui-doc/html/up.png
/usr/share/doc/libgladeui-doc/html/home.png
/usr/share/doc/libgladeui-doc/html/GladeWidgetAction.html
/usr/share/doc/libgladeui-doc/html/GladePalette.html
/usr/share/doc/libgladeui-doc/html/left.png
/usr/share/doc/libgladeui-doc/html/ix01.html
/usr/share/doc/libgladeui-doc/html/gladeui-glade-command.html
/usr/share/doc/libgladeui-doc/html/index.sgml
/usr/share/doc/libgladeui-doc/html/GladeApp.html
/usr/share/doc/libgladeui-doc/html/gladeui-glade-parameter.html
/usr/share/doc/libgladeui-doc/html/properties.html
/usr/share/doc/libgladeui-doc/html/GladeBaseEditor.html
/usr/share/doc/libgladeui-doc/html/style.css
/usr/share/doc/libgladeui-doc/html/gladeui-glade-editor.html
/usr/share/doc/libgladeui-doc/html/GladeDesignView.html
/usr/share/doc/libgladeui-doc/html/GladeProperty.html
/usr/share/doc/libgladeui-doc/html/gladeui-GladeFixed.html
/usr/share/doc/libgladeui-doc/html/catalog.html
/usr/share/doc/libgladeui-doc/html/gladeui-GladeClipboardView.html
/usr/share/doc/libgladeui-doc/html/GladeWidget.html
/usr/share/doc/libgladeui-doc/html/GladePlaceholder.html
/usr/share/doc/libgladeui-doc/html/dockables.html
/usr/share/doc/libgladeui-doc/html/gladeui-Glade-Utils.html
/usr/share/doc/libgladeui-doc/html/gladeui-glade-widget-adaptor.html
/usr/share/doc/libgladeui-doc/html/GladeInspector.html
/usr/share/doc/libgladeui-doc/html/GladeClipboard.html
/usr/share/doc/libgladeui-doc/html/right.png
/usr/share/doc/libgladeui-doc/html/misc.html
/usr/share/doc/libgladeui-doc/html/GladeProject.html
/usr/share/doc/libgladeui-doc/html/gladeui-Xml-Utils.html
/usr/share/doc/libgladeui-doc/html/pythonsupport.html
/usr/share/doc/libgladeui-doc/TODO
/usr/share/doc/libgladeui-doc/AUTHORS
/usr/share/doc/libgladeui-doc/copyright
/usr/share/doc/libgladeui-doc/changelog.Debian.gz
/usr/share/gtk-doc/html/gladeui-2