[gnome-shell] Background: allow passing the settings schema from outside

[Giovanni Campagna <gcampagna src gnome org>]

commit 4413f816e6016e3759e7e0b2d8188ee62aa1ab6a
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Tue Aug 20 00:48:56 2013 +0200

    Background: allow passing the settings schema from outside
    
    This way it is possible to use different settings for different
    backgrounds.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=688210

 js/ui/background.js |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/js/ui/background.js b/js/ui/background.js
index 1d9ab7c..246060a 100644
--- a/js/ui/background.js
+++ b/js/ui/background.js
@@ -295,14 +295,15 @@ const Background = new Lang.Class({
     _init: function(params) {
         params = Params.parse(params, { monitorIndex: 0,
                                         layoutManager: Main.layoutManager,
-                                        effects: Meta.BackgroundEffects.NONE });
+                                        effects: Meta.BackgroundEffects.NONE,
+                                        settings: null });
         this.actor = new Meta.BackgroundGroup();
         this.actor._delegate = this;
 
         this._destroySignalId = this.actor.connect('destroy',
                                                    Lang.bind(this, this._destroy));
 
-        this._settings = new Gio.Settings({ schema: BACKGROUND_SCHEMA });
+        this._settings = params.settings;
         this._monitorIndex = params.monitorIndex;
         this._layoutManager = params.layoutManager;
         this._effects = params.effects;
@@ -716,8 +717,10 @@ const BackgroundManager = new Lang.Class({
                                         layoutManager: Main.layoutManager,
                                         monitorIndex: null,
                                         effects: Meta.BackgroundEffects.NONE,
-                                        controlPosition: true });
+                                        controlPosition: true,
+                                        settingsSchema: BACKGROUND_SCHEMA });
 
+        this._settings = new Gio.Settings({ schema: params.settingsSchema });
         this._container = params.container;
         this._layoutManager = params.layoutManager;
         this._effects = params.effects;
@@ -776,7 +779,8 @@ const BackgroundManager = new Lang.Class({
     _createBackground: function() {
         let background = new Background({ monitorIndex: this._monitorIndex,
                                           layoutManager: this._layoutManager,
-                                          effects: this._effects });
+                                          effects: this._effects,
+                                          settings: this._settings });
         this._container.add_child(background.actor);
 
         let monitor = this._layoutManager.monitors[this._monitorIndex];