[epiphany/gnome-40] Use username when retrieving passwords from password manager

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 9afe2e594fde6772f95a0060aaf51c976380f962
Author: Michael Catanzaro <mcatanzaro redhat com>
Date:   Fri Sep 17 11:13:03 2021 -0500

    Use username when retrieving passwords from password manager
    
    Looking up passwords is a two-step process:
    
     * Look up available usernames for the domain
     * Look up passwords for the username (for the domain)
    
    Currently if there is exactly one available username, we throw it away
    rather than passing it along. Oops!
    
    Part-of: <https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1014>
    
    
    (cherry picked from commit b3b90a79f70f68811e74d876e1f7af2c70643485)

 embed/web-process-extension/resources/js/ephy.js | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/embed/web-process-extension/resources/js/ephy.js 
b/embed/web-process-extension/resources/js/ephy.js
index 5cc68a4be..38b806f7a 100644
--- a/embed/web-process-extension/resources/js/ephy.js
+++ b/embed/web-process-extension/resources/js/ephy.js
@@ -493,6 +493,8 @@ Ephy.FormManager = class FormManager
                 if (users.length > 1) {
                     Ephy.log('More than one saved username, hooking menu for choosing which one to select');
                     this._preFillUserMenu = new Ephy.PreFillUserMenu(this, formAuth, users);
+                } else if (users.length === 1) {
+                    formAuth.username = users[0];
                 }
                 this.preFill(formAuth);
             });