[mutter] (4 commits) Non-fast-forward update to branch wip/carlosg/drop-device-idle-monitors

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

The branch 'wip/carlosg/drop-device-idle-monitors' 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:

  b0b5b08... backends: Drop per-device idle monitors
  eb23161... core: Do not update idle times for slave devices
  c0a43bd... backends: Drop meta_idle_monitor_get_for_device()

Commits added to the branch:

  5c704e3... cogl: Remove no-op cogl_shader_compile and cogl_shader_get_ (*)
  586723e... backends: Drop per-device idle monitors
  f7646af... core: Do not update idle times for slave devices
  1ecfdb1... backends: Drop meta_idle_monitor_get_for_device()

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