Store GjsContext pointer in ShellGlobal

Future functionality in ShellGlobal needs access to the GjsContext.

https://bugzilla.gnome.org/show_bug.cgi?id=599561

src/shell-global.c

@@ -18,6 +18,7 @@
 #include <glib/gi18n-lib.h>
 #include <math.h>
 #include <X11/extensions/Xfixes.h>
+#include <gjs/gjs.h>
 
 #define SHELL_DBUS_SERVICE "org.gnome.Shell"
 
@@ -37,7 +38,8 @@ struct _ShellGlobal {
 
   ShellStageInputMode input_mode;
   XserverRegion input_region;
-  
+
+  GjsContext *js_context;
   MutterPlugin *plugin;
   ShellWM *wm;
   const char *datadir;
@@ -445,6 +447,13 @@ _shell_global_set_plugin (ShellGlobal  *global,
   global->wm = shell_wm_new (plugin);
 }
 
+void
+_shell_global_set_gjs_context (ShellGlobal *global,
+                               GjsContext  *context)
+{
+  global->js_context = context;
+}
+
 /**
  * shell_global_begin_modal:
  * @global: a #ShellGlobal