/usr/share/gtk-doc/html/ is in libgoocanvas-2.0-dev 2.0.2-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/goocanvas2/
/usr/share/gtk-doc/html/goocanvas2/GooCanvas.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasEllipse.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasEllipseModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasGrid.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasGridModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasGroup.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasGroupModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasImage.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasImageModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasItem.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasItemModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasItemModelSimple.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasItemSimple.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasPath.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasPathModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasPolyline.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasPolylineModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasRect.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasRectModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasStyle.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasTable.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasTableModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasText.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasTextModel.html
/usr/share/gtk-doc/html/goocanvas2/GooCanvasWidget.html
/usr/share/gtk-doc/html/goocanvas2/ch01.html
/usr/share/gtk-doc/html/goocanvas2/ch02.html
/usr/share/gtk-doc/html/goocanvas2/ch03.html
/usr/share/gtk-doc/html/goocanvas2/ch04.html
/usr/share/gtk-doc/html/goocanvas2/ch05.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-architecture.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-coordinates.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-creating-items.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-model-view-canvas.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-overview.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-simple-canvas.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas-wysiwyg.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas2-GooCanvas-Types.html
/usr/share/gtk-doc/html/goocanvas2/goocanvas2.devhelp2
/usr/share/gtk-doc/html/goocanvas2/home.png
/usr/share/gtk-doc/html/goocanvas2/index.html
/usr/share/gtk-doc/html/goocanvas2/index.sgml
/usr/share/gtk-doc/html/goocanvas2/left-insensitive.png
/usr/share/gtk-doc/html/goocanvas2/left.png
/usr/share/gtk-doc/html/goocanvas2/right-insensitive.png
/usr/share/gtk-doc/html/goocanvas2/right.png
/usr/share/gtk-doc/html/goocanvas2/style.css
/usr/share/gtk-doc/html/goocanvas2/up-insensitive.png
/usr/share/gtk-doc/html/goocanvas2/up.png