[gtk] (5 commits) Non-fast-forward update to branch win32-egl-cleanup

[Chun-wei Fan <fanchunwei src gnome org>]

The branch 'win32-egl-cleanup' 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:

  8847291... GDK-Win32: Drop GDK_WIN32_ENABLE_EGL flag
  c54aad3... GDK-Win32: Port to common EGL handling code
  c80af5e... gdkdisplay-win32.c: Fix builds without EGL

Commits added to the branch:

  30164d5... css: Render the background-clip area, not the background-or (*)
  222d927... Merge branch 'wip/otte/for-master' into 'master' (*)
  244f294... GDK-Win32: Drop GDK_WIN32_ENABLE_EGL flag
  4ee9b5d... GDK-Win32: Port to common EGL handling code
  7155f5f... gdkdisplay.c: Fix builds without EGL

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