/usr/share/gtk-doc/html/cogl-2.0-experimental/ is in libcogl-doc 1.10.0-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/cogl-2.0-experimental/ch01.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-2D-textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-3-Component-Vectors.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-3D-textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-CoglAttributeBuffer---Buffers-of-vertex-attributes.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-CoglBuffer---The-Buffer-Interface.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-CoglFramebuffer---The-Framebuffer-Interface.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-CoglIndexBuffer---Buffers-of-vertex-indices.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Color-Type.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Common-Types.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-GType-Integration-API.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-High-Level-Meta-Textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Indices.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Main-loop-integeration.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Matrices.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Offscreen-Framebuffers.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Path-Primitives.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Pipeline.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Primitives.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Quaternions-(Rotations).html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Rectangle-textures-(non-normalized-coordinates).html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Rectangles.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Shader-snippets.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Sliced-Textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Sub-Textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-The-Object-Interface.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-The-Texture-Interface.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-The-Top-Level-Context.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-Vertex-Attributes.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-X11-Texture-From-Pixmap.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental.devhelp2
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-Blend-Strings.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-buffer-apis.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-buffer-layout-apis.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-framebuffer-apis.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-integration.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-meta-textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-pipeline-apis.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-primitive-apis.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-textures.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-utilities.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl_ortho.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/coglglossary.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/fill-rule-even-odd.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/fill-rule-non-zero.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/home.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/index.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/index.sgml
/usr/share/gtk-doc/html/cogl-2.0-experimental/ix01.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/ix02.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/ix03.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/ix04.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/ix05.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/ix06.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/left.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/license.html
/usr/share/gtk-doc/html/cogl-2.0-experimental/quad-indices-order.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/quad-indices-triangles.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/right.png
/usr/share/gtk-doc/html/cogl-2.0-experimental/style.css
/usr/share/gtk-doc/html/cogl-2.0-experimental/up.png