[epiphany] web-extension: Fix password prompt

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ccd2004efe6d7b3fdaf874a5c38d6fd5bd1d254a
Author: Exalm <exalm7659 gmail com>
Date:   Thu Jan 18 16:26:17 2018 +0500

    web-extension: Fix password prompt
    
    Fixes regression from bug 742573

 embed/web-extension/ephy-web-extension.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/embed/web-extension/ephy-web-extension.c b/embed/web-extension/ephy-web-extension.c
index c9dead9..07127a7 100644
--- a/embed/web-extension/ephy-web-extension.c
+++ b/embed/web-extension/ephy-web-extension.c
@@ -415,7 +415,7 @@ should_store_cb (GList    *records,
   if (permission == EPHY_PERMISSION_UNDECIDED && ephy_dot_dir_is_web_application ())
     permission = EPHY_PERMISSION_PERMIT;
 
-  password = ephy_embed_form_auth_get_username (form_auth);
+  password = ephy_embed_form_auth_get_password (form_auth);
   if (password == NULL || strlen (password) == 0)
     goto out;