[gnome-documents] Use schema_id instead of deprecated schema

[Debarshi Ray <debarshir src gnome org>]

commit b4610bab5fc717b5bbb3b68644626e101a77d57d
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Feb 9 12:05:42 2015 +0100

    Use schema_id instead of deprecated schema
    
    Fallout from 17322bb4b627ebfef0b8c36ba22d390d0910faa6

 src/application.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/application.js b/src/application.js
index 2ca4cc1..0c86d93 100644
--- a/src/application.js
+++ b/src/application.js
@@ -442,9 +442,9 @@ const Application = new Lang.Class({
 
         application = this;
         if (!application.isBooks)
-            settings = new Gio.Settings({ schema: 'org.gnome.documents' });
+            settings = new Gio.Settings({ schema_id: 'org.gnome.documents' });
         else
-            settings = new Gio.Settings({ schema: 'org.gnome.books' });
+            settings = new Gio.Settings({ schema_id: 'org.gnome.books' });
 
         let gtkSettings = Gtk.Settings.get_default();
         gtkSettings.connect('notify::gtk-theme-name', Lang.bind(this, this._themeChanged));