[gnome-software/gnome-3-20] Allow the dummy backend to handle the distro upgrade

[Richard Hughes <rhughes src gnome org>]

commit 1e622612489680c24ed6428e3f23dd8c2e6f61bf
Author: Richard Hughes <richard hughsie com>
Date:   Thu Apr 14 18:11:09 2016 +0100

    Allow the dummy backend to handle the distro upgrade

 src/plugins/gs-plugin-dummy.c |   44 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 44 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gs-plugin-dummy.c b/src/plugins/gs-plugin-dummy.c
index d6897e9..c4aee38 100644
--- a/src/plugins/gs-plugin-dummy.c
+++ b/src/plugins/gs-plugin-dummy.c
@@ -251,6 +251,7 @@ gs_plugin_add_distro_upgrades (GsPlugin *plugin,
        gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
        gs_app_set_name (app, GS_APP_QUALITY_LOWEST, "Fedora");
        gs_app_set_version (app, "24");
+       gs_app_set_management_plugin (app, plugin->name);
        gs_plugin_add_app (list, app);
        return TRUE;
 }
@@ -351,6 +352,49 @@ gs_plugin_refresh (GsPlugin *plugin,
 }
 
 /**
+ * gs_plugin_app_upgrade_download:
+ */
+gboolean
+gs_plugin_app_upgrade_download (GsPlugin *plugin, GsApp *app,
+                               GCancellable *cancellable, GError **error)
+{
+       /* only process this app if was created by this plugin */
+       if (g_strcmp0 (gs_app_get_management_plugin (app), plugin->name) != 0)
+               return TRUE;
+
+       g_debug ("starting download");
+       gs_app_set_state (app, AS_APP_STATE_INSTALLING);
+       if (!gs_plugin_dummy_delay (plugin, app, 5000, cancellable, error))
+               return FALSE;
+       return TRUE;
+}
+
+/**
+ * gs_plugin_app_upgrade_trigger:
+ */
+gboolean
+gs_plugin_app_upgrade_trigger (GsPlugin *plugin, GsApp *app,
+                              GCancellable *cancellable, GError **error)
+{
+       /* only process this app if was created by this plugin */
+       if (g_strcmp0 (gs_app_get_management_plugin (app), plugin->name) != 0)
+               return TRUE;
+
+       /* NOP */
+       return TRUE;
+}
+
+/**
+ * gs_plugin_offline_update_cancel:
+ */
+gboolean
+gs_plugin_offline_update_cancel (GsPlugin *plugin, GsApp *app,
+                        GCancellable *cancellable, GError **error)
+{
+       return TRUE;
+}
+
+/**
  * gs_plugin_review_submit:
  */
 gboolean