[gnome-shell/gnome-3-36] environment: Move g_dbus_connection_call() promisification

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

commit 654a7af9290b318046440bc5335105d4c085ad4d
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Dec 19 20:50:37 2019 +0100

    environment: Move g_dbus_connection_call() promisification
    
    Commit 83c6b2ab promisified the method in endSessionDialog, which means
    that after the module is imported, every caller will get the promisifed
    version. That can be a bit surprising in completely unrelated modules,
    so commit 764527c8 (on master) moved the promisification of more common
    methods into environment, as that's initialized early and expected to be
    shared between anything else.
    
    Do the same for the call() method on the stable branch.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2551

 js/ui/endSessionDialog.js | 2 --
 js/ui/environment.js      | 2 ++
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/endSessionDialog.js b/js/ui/endSessionDialog.js
index 44747ea28f..cd6e712482 100644
--- a/js/ui/endSessionDialog.js
+++ b/js/ui/endSessionDialog.js
@@ -29,8 +29,6 @@ const UserWidget = imports.ui.userWidget;
 
 const { loadInterfaceXML } = imports.misc.fileUtils;
 
-Gio._promisify(Gio.DBusConnection.prototype, 'call', 'call_finish');
-
 const _ITEM_ICON_SIZE = 64;
 
 const EndSessionDialogIface = loadInterfaceXML('org.gnome.SessionManager.EndSessionDialog');
diff --git a/js/ui/environment.js b/js/ui/environment.js
index 6764bd2797..d1724a4642 100644
--- a/js/ui/environment.js
+++ b/js/ui/environment.js
@@ -14,6 +14,8 @@ const { Clutter, Gio, GLib, GObject, Meta, Shell, St } = imports.gi;
 const Gettext = imports.gettext;
 const System = imports.system;
 
+Gio._promisify(Gio.DBusConnection.prototype, 'call', 'call_finish');
+
 let _localTimeZone = null;
 
 // We can't import shell JS modules yet, because they may have