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

ios/chrome/browser/passwords/ios_chrome_password_manager_infobar_delegate.h

 // Copyright 2016 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.
 
 #ifndef IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_PASSWORD_MANAGER_INFOBAR_DELEGATE_H_
 #define IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_PASSWORD_MANAGER_INFOBAR_DELEGATE_H_
 
 #include <memory>
 
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/password_manager/core/browser/password_manager_metrics_util.h"
 
 namespace password_manager {
 class PasswordFormManager;
 }
 
 // Base class for password manager infobar delegates, e.g.
 // IOSChromeSavePasswordInfoBarDelegate and
 // IOSChromeUpdatePasswordInfoBarDelegate. Provides link text and action for
 // smart lock.
 class IOSChromePasswordManagerInfoBarDelegate : public ConfirmInfoBarDelegate {
  public:
   ~IOSChromePasswordManagerInfoBarDelegate() override;
 
  protected:
   IOSChromePasswordManagerInfoBarDelegate(
       bool is_smart_lock_branding_enabled,
-      scoped_refptr<password_manager::PasswordFormManager> form_manager);
+      std::unique_ptr<password_manager::PasswordFormManager> form_manager);
 
   password_manager::PasswordFormManager* form_to_save() const {
     return form_to_save_.get();
   }
 
   bool is_smart_lock_branding_enabled() const {
     return is_smart_lock_branding_enabled_;
   }
 
   void set_infobar_response(
       password_manager::metrics_util::UIDismissalReason response) {
     infobar_response_ = response;
   }
 
  private:
   // ConfirmInfoBarDelegate implementation.
   Type GetInfoBarType() const override;
   base::string16 GetLinkText() const override;
   int GetIconId() const override;
   bool LinkClicked(WindowOpenDisposition disposition) override;
 
   // The password_manager::PasswordFormManager managing the form we're asking
   // the user about, and should save as per their decision.
-  scoped_refptr<password_manager::PasswordFormManager> form_to_save_;
+  std::unique_ptr<password_manager::PasswordFormManager> form_to_save_;
 
   // Used to track the results we get from the info bar.
   password_manager::metrics_util::UIDismissalReason infobar_response_;
 
   // Whether to show the password manager branded as Smart Lock.
   const bool is_smart_lock_branding_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSChromePasswordManagerInfoBarDelegate);
 };
 #endif  // IOS_CHROME_BROWSER_PASSWORDS_IOS_CHROME_PASSWORD_MANAGER_INFOBAR_DELEGATE_H_