/usr/share/gtk-doc/html/ is in libgtksourceview-3.0-doc 3.10.2-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/gtksourceview-3.0/
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceBuffer.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletion.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletionContext.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletionInfo.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletionItem.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletionProposal.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletionProvider.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceCompletionWords.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceGutter.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceGutterRenderer.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceGutterRendererPixbuf.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceGutterRendererText.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceLanguage.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceLanguageManager.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceMark.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceMarkAttributes.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourcePrintCompositor.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceSearchContext.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceSearchSettings.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceStyle.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceStyleScheme.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceStyleSchemeManager.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceUndoManager.html
/usr/share/gtk-doc/html/gtksourceview-3.0/GtkSourceView.html
/usr/share/gtk-doc/html/gtksourceview-3.0/annotation-glossary.html
/usr/share/gtk-doc/html/gtksourceview-3.0/api-index-3-0.html
/usr/share/gtk-doc/html/gtksourceview-3.0/api-index-3-10.html
/usr/share/gtk-doc/html/gtksourceview-3.0/api-index-3-4.html
/usr/share/gtk-doc/html/gtksourceview-3.0/api-index-deprecated.html
/usr/share/gtk-doc/html/gtksourceview-3.0/api-index-full.html
/usr/share/gtk-doc/html/gtksourceview-3.0/ch01.html
/usr/share/gtk-doc/html/gtksourceview-3.0/ch02.html
/usr/share/gtk-doc/html/gtksourceview-3.0/gtksourceview-3.0-GtkSourceUtils.html
/usr/share/gtk-doc/html/gtksourceview-3.0/gtksourceview-3.0.devhelp2
/usr/share/gtk-doc/html/gtksourceview-3.0/home.png
/usr/share/gtk-doc/html/gtksourceview-3.0/index.html
/usr/share/gtk-doc/html/gtksourceview-3.0/index.sgml
/usr/share/gtk-doc/html/gtksourceview-3.0/lang-reference.html
/usr/share/gtk-doc/html/gtksourceview-3.0/lang-tutorial.html
/usr/share/gtk-doc/html/gtksourceview-3.0/left-insensitive.png
/usr/share/gtk-doc/html/gtksourceview-3.0/left.png
/usr/share/gtk-doc/html/gtksourceview-3.0/object-tree.html
/usr/share/gtk-doc/html/gtksourceview-3.0/right-insensitive.png
/usr/share/gtk-doc/html/gtksourceview-3.0/right.png
/usr/share/gtk-doc/html/gtksourceview-3.0/style-reference.html
/usr/share/gtk-doc/html/gtksourceview-3.0/style.css
/usr/share/gtk-doc/html/gtksourceview-3.0/up-insensitive.png
/usr/share/gtk-doc/html/gtksourceview-3.0/up.png