js: Use GioUnix instead of Gio.Unix in a few places.

Gio.Unix* is deprecated introspection.

ref: #13091

Author: mtwebster

js/misc/loginManager.js

@@ -1,6 +1,7 @@
 // -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
 
 const Gio = imports.gi.Gio;
+const GioUnix = imports.gi.GioUnix;
 const GLib = imports.gi.GLib;
 const Signals = imports.signals;
 
@@ -205,7 +206,7 @@ var LoginManagerSystemd = class {
                     let [outVariant_, fdList] = proxy.call_with_unix_fd_list_finish(result);
                     let fd = fdList.steal_fds()[0];
                     _log(`LoginManager: Sleep inhibitor acquired (fd=${fd})`);
-                    callback(new Gio.UnixInputStream({ fd }));
+                    callback(new GioUnix.InputStream({ fd }));
                 } catch (e) {
                     global.logError('LoginManager: Error getting inhibitor: ' + e.message);
                     callback(null);

js/ui/networkAgent.js

@@ -2,6 +2,7 @@
 
 const Clutter = imports.gi.Clutter;
 const Gio = imports.gi.Gio;
+const GioUnix = imports.gi.GioUnix;
 const GLib = imports.gi.GLib;
 const GObject = imports.gi.GObject;
 const NM = imports.gi.NM;
@@ -392,8 +393,8 @@ var VPNRequestHandler = class {
                                             null /* child_setup */);
 
             this._childPid = pid;
-            this._stdin = new Gio.UnixOutputStream({ fd: stdin, close_fd: true });
-            this._stdout = new Gio.UnixInputStream({ fd: stdout, close_fd: true });
+            this._stdin = new GioUnix.OutputStream({ fd: stdin, close_fd: true });
+            this._stdout = new GioUnix.InputStream({ fd: stdout, close_fd: true });
             GLib.close(stderr);
             this._dataStdout = new Gio.DataInputStream({ base_stream: this._stdout });