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

ios/chrome/browser/passwords/ios_chrome_password_manager_client.h

Index: ios/chrome/browser/passwords/ios_chrome_password_manager_client.h
diff --git a/ios/chrome/browser/passwords/ios_chrome_password_manager_client.h b/ios/chrome/browser/passwords/ios_chrome_password_manager_client.h
index b0cbd424ab0b7ddb6d566f3997e66b5eb1c67cfd..2e5aa6c4d9d4072db110a7f12389e3210ab93d9c 100644
--- a/ios/chrome/browser/passwords/ios_chrome_password_manager_client.h
+++ b/ios/chrome/browser/passwords/ios_chrome_password_manager_client.h
@@ -22,11 +22,11 @@ class PasswordFormManager;
 
 // Shows UI to prompt the user to save the password.
 - (void)showSavePasswordInfoBar:
-    (std::unique_ptr<password_manager::PasswordFormManager>)formToSave;
+    (scoped_refptr<password_manager::PasswordFormManager>)formToSave;
 
 // Shows UI to prompt the user to update the password.
 - (void)showUpdatePasswordInfoBar:
-    (std::unique_ptr<password_manager::PasswordFormManager>)formToUpdate;
+    (scoped_refptr<password_manager::PasswordFormManager>)formToUpdate;
 
 @property(readonly, nonatomic) ios::ChromeBrowserState* browserState;
 
@@ -46,14 +46,14 @@ class IOSChromePasswordManagerClient
   // password_manager::PasswordManagerClient implementation.
   password_manager::PasswordSyncState GetPasswordSyncState() const override;
   bool PromptUserToSaveOrUpdatePassword(
-      std::unique_ptr<password_manager::PasswordFormManager> form_to_save,
+      scoped_refptr<password_manager::PasswordFormManager> form_to_save,
       bool update_password) override;
   bool PromptUserToChooseCredentials(
       std::vector<std::unique_ptr<autofill::PasswordForm>> local_forms,
       const GURL& origin,
       const CredentialsCallback& callback) override;
   void AutomaticPasswordSave(
-      std::unique_ptr<password_manager::PasswordFormManager> saved_form_manager)
+      scoped_refptr<password_manager::PasswordFormManager> saved_form_manager)
       override;
   bool IsIncognito() const override;
   PrefService* GetPrefs() override;