[gnome-shell] main: Don't depend on GSystem unconditionally

[Florian Müllner <fmuellner src gnome org>]

commit 8c45e6fa43f49ffef0bf1839f08c1610adc706cc
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat May 3 20:57:49 2014 +0200

    main: Don't depend on GSystem unconditionally
    
    We only need GSystem when running under systemd. As libgsystem itself
    has a hard dependency on systemd, only import it when actually needed
    to keep working on systems where systemd is not available.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728449

 js/ui/main.js |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/main.js b/js/ui/main.js
index 1958abe..b596463 100644
--- a/js/ui/main.js
+++ b/js/ui/main.js
@@ -9,7 +9,6 @@ const Mainloop = imports.mainloop;
 const Meta = imports.gi.Meta;
 const Shell = imports.gi.Shell;
 const St = imports.gi.St;
-const GSystem = imports.gi.GSystem;
 
 const Components = imports.ui.components;
 const CtrlAltTab = imports.ui.ctrlAltTab;
@@ -214,6 +213,9 @@ function _initializeUI() {
                                   screenShield.lockIfWasLocked();
                               }
                               if (LoginManager.haveSystemd() && sessionMode.currentMode === 'user') {
+                                  // Do not import globally to not depend
+                                  // on systemd on non-systemd systems.
+                                  let GSystem = imports.gi.GSystem;
                                   GSystem.log_structured_print('GNOME Shell started at ' + _startDate,
                                                                ['MESSAGE_ID=' + 
GNOMESHELL_STARTED_MESSAGE_ID]);
                               } else {