Revert of [Password Manager] Convert |pending_login_managers_| to an array of scoped_refptr

ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm

Index: ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
diff --git a/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm b/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
index 19f20bcdbb78fdbddb6c564c575c92e25b6eb2ec..6c7c82afe9c95857d2d2898d819877906b71f6ff 100644
--- a/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
+++ b/ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm
@@ -69,7 +69,7 @@
 }
 
 bool IOSChromePasswordManagerClient::PromptUserToSaveOrUpdatePassword(
-    scoped_refptr<PasswordFormManager> form_to_save,
+    std::unique_ptr<PasswordFormManager> form_to_save,
     bool update_password) {
   if (form_to_save->IsBlacklisted())
     return false;
@@ -84,7 +84,7 @@
 }
 
 void IOSChromePasswordManagerClient::AutomaticPasswordSave(
-    scoped_refptr<PasswordFormManager> saved_form_manager) {
+    std::unique_ptr<PasswordFormManager> saved_form_manager) {
   NOTIMPLEMENTED();
 }