[gtk] (3 commits) Non-fast-forward update to branch wip/chergert/gdk-macos-gl-renderer

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/gdk-macos-gl-renderer' 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:

  929fb25... macos: always create dummy window/view for GL context
  fb7b53d... macos: use gdk_surface_request_motion()

Commits added to the branch:

  e91b930... Revert "Simplify gdk_surface_queue_render" (*)
  ce9cc2d... macos: always create dummy window/view for GL context
  7444a15... macos: remove synthesize_motion helper

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