[mutter] (21 commits) Non-fast-forward update to branch wip/surface-content

[Jasper St. Pierre <jstpierre src gnome org>]

The branch 'wip/surface-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:

 http://live.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  89d6207... compositor: Remove atom_x_root_pixmap
  7adb06b... Move _NET_WM_WINDOW_OPACITY handling to the standard window
  291b777... window-actor: Remove suspicious optimization
  73aa331... surface-actor: Move unobscured_region processing here
  3a4da7e... window-actor: Remove outdated code path
  a6c1415... window-actor: Never unredirect when under Wayland
  7582e0a... window-actor: Simplify the unredirected check in cull_out
  295dc9a... compositor: Simplify the unredirected window management cod
  c384884... window-actor: Flip set_redirected around
  0b15ef5... window-actor: Remove old unused APIs
  3c040c0... Move position-changed / size-changed signals to the MetaWin
  4e262cd... window: Add a simple meta_window_get_toplevel_xwindow utili
  cb49828... window-actor: Remove (private) xwindow property
  c76821f... window-actor: Remove meta-screen property
  6ab226d... surface content

Commits added to the branch:

  fd8cc9b... xwayland: Remove outdated code (*)
  1b600f5... window-actor: Use g_signal_connect_object (*)
  f0fa4d8... window: Add a simple meta_window_get_toplevel_xwindow utili
  422648e... window-actor: Remove (private) xwindow property
  98dbba1... window-actor: Remove meta-screen property
  401cc05... compositor: Remove atom_x_root_pixmap
  d6b84c0... Move _NET_WM_WINDOW_OPACITY handling to the standard window
  1d23982... window-actor: Make the meta-window property construct-only
  214bb7e... window-actor: Move signal handler connections to the meta-w
  9f38358... window-actor: Remove suspicious optimization
  1516744... surface-actor: Move unobscured_region processing here
  e472abb... window-actor: Remove outdated code path
  1da93e7... window-actor: Never unredirect when under Wayland
  abae697... window-actor: Simplify the unredirected check in cull_out
  4e39fc8... compositor: Simplify the unredirected window management cod
  5e1aa7c... window-actor: Flip set_redirected around
  32c151b... window-actor: Remove old unused APIs
  2d2fe22... Move position-changed / size-changed signals to the MetaWin
  13c191a... surface content
  f130905... xwayland: Update the surface actor for the window on set_wi
  6c3e408... window-actor: Don't use TFP under XWayland

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