[gnome-shell] ShellUserVerifier: Add method to check if the service name is fingerprint

[Marge Bot <marge-bot src gnome org>]

commit f7685dc224bb288e5fecb178aaccdedeac07923f
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Mon Feb 8 17:07:45 2021 +0100

    ShellUserVerifier: Add method to check if the service name is fingerprint
    
    We have multiple places where we check if we're handling a fingerprint
    event, so let's add a common public function so that it can be used also
    by the authPrompt.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1652>

 js/gdm/util.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/js/gdm/util.js b/js/gdm/util.js
index a98d63509b..c53fbd2176 100644
--- a/js/gdm/util.js
+++ b/js/gdm/util.js
@@ -474,6 +474,11 @@ var ShellUserVerifier = class {
         return serviceName == this._defaultService;
     }
 
+    serviceIsFingerprint(serviceName) {
+        return this._fingerprintReaderType !== FingerprintReaderType.NONE &&
+            serviceName === FINGERPRINT_SERVICE_NAME;
+    }
+
     _updateDefaultService() {
         if (this._settings.get_boolean(PASSWORD_AUTHENTICATION_KEY))
             this._defaultService = PASSWORD_SERVICE_NAME;
@@ -527,8 +532,7 @@ var ShellUserVerifier = class {
     _onInfo(client, serviceName, info) {
         if (this.serviceIsForeground(serviceName)) {
             this._queueMessage(info, MessageType.INFO);
-        } else if (serviceName == FINGERPRINT_SERVICE_NAME &&
-            this._fingerprintReaderType !== FingerprintReaderType.NONE) {
+        } else if (this.serviceIsFingerprint(serviceName)) {
             // We don't show fingerprint messages directly since it's
             // not the main auth service. Instead we use the messages
             // as a cue to display our own message.