Bug 938014 - Don't assume Glib IO comes with DBus. r=karlt

toolkit/system/gnome/nsGIOService.cpp

@@ -12,8 +12,10 @@
 
 #include <gio/gio.h>
 #include <gtk/gtk.h>
+#ifdef MOZ_ENABLE_DBUS
 #include <dbus/dbus-glib.h>
 #include <dbus/dbus-glib-lowlevel.h>
+#endif
 
 
 char *
@@ -382,6 +384,9 @@ nsGIOService::ShowURIForInput(const nsACString& aUri)
 NS_IMETHODIMP
 nsGIOService::OrgFreedesktopFileManager1ShowItems(const nsACString& aPath)
 {
+#ifndef MOZ_ENABLE_DBUS
+  return NS_ERROR_FAILURE;
+#else
   GError* error = nullptr;
   static bool org_freedesktop_FileManager1_exists = true;
 
@@ -427,6 +432,7 @@ nsGIOService::OrgFreedesktopFileManager1ShowItems(const nsACString& aPath)
   }
 
   return NS_OK;
+#endif
 }
 
 /**