Test that LoginDatabase preserves PasswordForm::Scheme through migration

components/test/data/password_manager/login_db_v8.sql

Index: components/test/data/password_manager/login_db_v8.sql
diff --git a/components/test/data/password_manager/login_db_v8.sql b/components/test/data/password_manager/login_db_v8.sql
index 4e8b4d903e03eb11f514cbc3764d4351d8205106..9fee7c9aa6ab200ff4570e6d93c96c22d3b460f7 100644
--- a/components/test/data/password_manager/login_db_v8.sql
+++ b/components/test/data/password_manager/login_db_v8.sql
@@ -78,6 +78,31 @@ NULL, /* use_additional_auth */
 '', /* federation_url */
 0  /* is_zero_click */
 );
+INSERT INTO "logins" VALUES(
+'http://example.com', /* origin_url */
+'http://example.com/landing', /* action_url */
+'', /* username_element */
+'user', /* username_value */
+'', /* password_element */
+X'', /* password_value */
+'', /* submit_element */
+'http://example.com', /* signon_realm */
+1, /* ssl_valid */
+1, /* preferred */
+1402950000, /* date_created */
+0, /* blacklisted_by_user */
+1, /* scheme */
+0, /* password_type */
+X'00000000', /* possible_usernames */
+1, /* times_used */
+X'18000000020000000000000000000000000000000000000000000000', /* form_data */
+NULL, /* use_additional_auth */
+0, /* date_synced */
+'', /* display_name */
+'https://www.google.com/icon', /* avatar_url */
+'', /* federation_url */
+0  /* is_zero_click */
+);
 CREATE INDEX logins_signon ON logins (signon_realm);
 COMMIT;