Move get_updates into a module.

(imported from commit 9a6c0ab1e76dd96abad8626bc5b1fdbd234b2645)

static/js/socket.js

@@ -183,7 +183,7 @@ Socket.prototype = {
                 // If this is a reconnect, network was probably
                 // recently interrupted, so we optimistically restart
                 // get_updates
-                restart_get_updates();
+                server_events.restart_get_updates();
             }
             that._is_open = true;