[mutter] (20 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:

  7c5ceb3... window-actor: Remove outdated code path
  07017bf... window-actor: Never unredirect when under Wayland
  453e09f... window-actor: Simplify the unredirected check in cull_out
  4939a90... compositor: Remove atom_x_root_pixmap
  e51786c... Move _NET_WM_WINDOW_OPACITY handling to the standard window
  b6b850e... window-actor: Remove old unused APIs
  6ff5732... Move position-changed / size-changed signals to the MetaWin
  2e9f965... window: Add a simple meta_window_get_toplevel_xwindow utili
  b9d0cad... window-actor: Remove (private) xwindow property
  578b5a3... window-actor: Remove meta-screen property
  94eae35... window-actor: Remove suspicious optimization
  6f3bc39... surface-actor: Move work out of _new constructor
  7f763fb... surface-actor: Don't use self->priv->foo directly
  8148aaf... surface-actor: Move unobscured_region processing here
  19261ed... compositor: Simplify the unredirected window management cod
  7c40d38... window-actor: Flip set_redirected around
  6e379e3... surface content

Commits added to the branch:

  309f78f... display: Fix window pings (*)
  1481836... surface-actor: Move work out of _new constructor (*)
  57602ad... surface-actor: Don't use self->priv->foo directly (*)
  ee683ff... window: Fix meta_window_ping some more (*)
  ca5b5e6... surface-actor: Reindent (*)
  2ace19c... window-actor: Remove suspicious optimization
  28599c1... surface-actor: Move unobscured_region processing here
  b293855... window-actor: Remove outdated code path
  c0fc690... window-actor: Never unredirect when under Wayland
  1e07d20... window-actor: Simplify the unredirected check in cull_out
  cd0ca39... compositor: Simplify the unredirected window management cod
  ad07d70... window-actor: Flip set_redirected around
  b0f87e9... compositor: Remove atom_x_root_pixmap
  438e7ec... Move _NET_WM_WINDOW_OPACITY handling to the standard window
  e6454c0... window-actor: Remove old unused APIs
  b0618b2... Move position-changed / size-changed signals to the MetaWin
  bb0dc96... window: Add a simple meta_window_get_toplevel_xwindow utili
  bdc36bb... window-actor: Remove (private) xwindow property
  acfcae8... window-actor: Remove meta-screen property
  d49fb72... surface content

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