[mutter] (11 commits) Non-fast-forward update to branch gbsneto/content

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

The branch 'gbsneto/content' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  02fb8a0... clutter/paint-node: Expose clutter_paint_node_get_framebuff
  0c20b07... shaped-texture: Implement ClutterContent
  89e63cb... wayland/actor-surface: Set geometry scale in surface actor
  b1917d4... shaped-texture: Draw pipeline relative to alloc
  f4bce4f... shaped-texture: Move MetaCullable helpers to MetaSurfaceAct
  03b44e6... shaped-texture: Move private function to private header
  076efd8... wayland/tablet-tool: Use meta_wayland_surface_get_relative_

Commits added to the branch:

  0e3c062... dnd: Use composite_overlay_window directly (*)
  7c8baf8... compositor: Drop meta_get_overlay_window() (*)
  3b6d60b... clutter/paint-node: Expose clutter_paint_node_get_framebuff
  069e45d... shaped-texture: Implement ClutterContent
  f679507... wayland/actor-surface: Set geometry scale in surface actor
  915d4ed... shaped-texture: Draw pipeline relative to alloc
  9031849... shaped-texture: Move MetaCullable helpers to MetaSurfaceAct
  f434a56... shaped-texture: Move private function to private header
  b2a5aab... wayland/tablet-tool: Use meta_wayland_surface_get_relative_
  46b88fa... wayland: Don't scale input and opaque regions
  ee69380... window-actor: Handle geometry scale

(*) This commit already existed in another branch; no separate mail sent