[Password Manager] Make filling robust against changing url by JavaScript

components/autofill/content/renderer/password_form_conversion_utils.cc

Index: components/autofill/content/renderer/password_form_conversion_utils.cc
diff --git a/components/autofill/content/renderer/password_form_conversion_utils.cc b/components/autofill/content/renderer/password_form_conversion_utils.cc
index 5d56dc545bee414ea11b71317057401f2708b16b..825f44621b91938fe3c784629d38498141d2b701 100644
--- a/components/autofill/content/renderer/password_form_conversion_utils.cc
+++ b/components/autofill/content/renderer/password_form_conversion_utils.cc
@@ -593,10 +593,7 @@ bool GetPasswordForm(
 
   password_form->origin =
       form_util::GetCanonicalOriginForDocument(form.document);
-  GURL::Replacements rep;
-  rep.SetPathStr("");
-  password_form->signon_realm =
-      password_form->origin.ReplaceComponents(rep).spec();
+  password_form->signon_realm = GetSignOnRealm(password_form->origin);
   password_form->other_possible_usernames.swap(other_possible_usernames);
 
   if (!password.IsNull()) {
@@ -781,4 +778,10 @@ bool IsCreditCardVerificationPasswordField(
          MatchesPattern(field.GetAttribute("name").Utf16(), kCardCvcReCached);
 }
 
+std::string GetSignOnRealm(const GURL& origin) {
+  GURL::Replacements rep;
+  rep.SetPathStr("");
+  return origin.ReplaceComponents(rep).spec();
+}
+
 }  // namespace autofill