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

ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/passwords/ios_chrome_password_manager_client.h"
 
 #include <memory>
 #include <utility>
 
 #include "components/autofill/core/common/password_form.h"
@@ skipping 51 matching lines @@
 
 bool IOSChromePasswordManagerClient::PromptUserToChooseCredentials(
     std::vector<std::unique_ptr<autofill::PasswordForm>> local_forms,
     const GURL& origin,
     const CredentialsCallback& callback) {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool IOSChromePasswordManagerClient::PromptUserToSaveOrUpdatePassword(
-    std::unique_ptr<PasswordFormManager> form_to_save,
+    scoped_refptr<PasswordFormManager> form_to_save,
     bool update_password) {
   if (form_to_save->IsBlacklisted())
     return false;
 
   if (update_password) {
     [delegate_ showUpdatePasswordInfoBar:std::move(form_to_save)];
   } else {
     [delegate_ showSavePasswordInfoBar:std::move(form_to_save)];
   }
 
   return true;
 }
 
 void IOSChromePasswordManagerClient::AutomaticPasswordSave(
-    std::unique_ptr<PasswordFormManager> saved_form_manager) {
+    scoped_refptr<PasswordFormManager> saved_form_manager) {
   NOTIMPLEMENTED();
 }
 
 bool IOSChromePasswordManagerClient::IsIncognito() const {
   return (delegate_.browserState)->IsOffTheRecord();
 }
 
 PrefService* IOSChromePasswordManagerClient::GetPrefs() {
   return (delegate_.browserState)->GetPrefs();
 }
@@ skipping 28 matching lines @@
 }
 
 const GURL& IOSChromePasswordManagerClient::GetLastCommittedEntryURL() const {
   return delegate_.lastCommittedURL;
 }
 
 const password_manager::CredentialsFilter*
 IOSChromePasswordManagerClient::GetStoreResultFilter() const {
   return &credentials_filter_;
 }