Bug 1662718: enable "test_input_hasBeenTypePassword_navigation.html" for xorigin iframes with Fission. r=smaug

Requires bug 1662410 (removing `LegacySHistory`) and bug 1656208 (session history
in parent).

Differential Revision: https://phabricator.services.mozilla.com/D90378

dom/html/test/forms/mochitest.ini

@@ -52,7 +52,6 @@ support-files = file_double_submit.html
 [test_input_hasBeenTypePassword.html]
 [test_input_hasBeenTypePassword_navigation.html]
 support-files = file_login_fields.html
-skip-if = (xorigin && fission) # Session History, JavaScript error: javascript:history.back(), line 1: NS_ERROR_FAILURE:
 [test_input_list_attribute.html]
 [test_input_number_l10n.html]
 [test_input_number_key_events.html]