Don't change the HTTPS PasswordForm::action during HTTP -> HTTPS migration.

components/password_manager/core/browser/http_password_migrator.cc

Index: components/password_manager/core/browser/http_password_migrator.cc
diff --git a/components/password_manager/core/browser/http_password_migrator.cc b/components/password_manager/core/browser/http_password_migrator.cc
index 8f5552ad1f24b1cd5f5bdce02aa2933553db566a..da6eb67c31a7c4e0aeae847c8b5dce85a67a325a 100644
--- a/components/password_manager/core/browser/http_password_migrator.cc
+++ b/components/password_manager/core/browser/http_password_migrator.cc
@@ -47,7 +47,10 @@ void HttpPasswordMigrator::OnGetPasswordStoreResults(
     rep.SetSchemeStr(url::kHttpsScheme);
     form->origin = form->origin.ReplaceComponents(rep);
     form->signon_realm = form->origin.spec();
-    form->action = form->origin;
+    // If |action| is not HTTPS then it's most likely obsolete. Otherwise, it
+    // may still be valid.
+    if (!form->action.SchemeIs(url::kHttpsScheme))
+      form->action = form->origin;
     form->form_data = autofill::FormData();
     form->generation_upload_status = autofill::PasswordForm::NO_SIGNAL_SENT;
     form->skip_zero_click = false;