Move session to x11/

XSMP code is X11-specific, of course.

src/Makefile.am

@@ -144,8 +144,6 @@ libmutter_wayland_la_SOURCES =			\
 	core/screen-private.h			\
 	meta/screen.h				\
 	meta/types.h				\
-	core/session.c				\
-	core/session.h				\
 	core/stack.c				\
 	core/stack.h				\
 	core/stack-tracker.c			\
@@ -182,6 +180,8 @@ libmutter_wayland_la_SOURCES =			\
 	x11/group-props.h			\
 	x11/group.c				\
 	x11/group.h				\
+	x11/session.c				\
+	x11/session.h				\
 	x11/window-props.c			\
 	x11/window-props.h			\
 	x11/window-x11.c			\

src/core/main.c

@@ -50,7 +50,6 @@
 #include "display-private.h"
 #include <meta/errors.h>
 #include "ui.h"
-#include "session.h"
 #include <meta/prefs.h>
 #include <meta/compositor.h>
 
@@ -78,6 +77,8 @@
 #include <girepository.h>
 #endif
 
+#include "x11/session.h"
+
 #include "wayland/meta-wayland.h"
 
 /*

src/core/window.c

@@ -38,7 +38,6 @@
 #include "keybindings-private.h"
 #include "ui.h"
 #include "place.h"
-#include "session.h"
 #include <meta/prefs.h>
 #include "resizepopup.h"
 #include "constraints.h"
@@ -60,6 +59,7 @@
 #include "x11/window-props.h"
 #include "x11/xprops.h"
 #include "x11/group.h"
+#include "x11/session.h"
 
 #include "wayland/meta-wayland-private.h"