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

components/password_manager/core/browser/password_manager.h

Index: components/password_manager/core/browser/password_manager.h
diff --git a/components/password_manager/core/browser/password_manager.h b/components/password_manager/core/browser/password_manager.h
index 30990f6982fb4a533298628e5d9e0c7fcfef3691..b85165d98ed64cd788c37762ad08ba0c6bc2e488 100644
--- a/components/password_manager/core/browser/password_manager.h
+++ b/components/password_manager/core/browser/password_manager.h
@@ -13,7 +13,6 @@
 #include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
@@ -185,7 +184,7 @@
 #if defined(UNIT_TEST)
   // TODO(crbug.com/639786): Replace using this by quering the factory for
   // mocked PasswordFormManagers.
-  const std::vector<scoped_refptr<PasswordFormManager>>&
+  const std::vector<std::unique_ptr<PasswordFormManager>>&
   pending_login_managers() {
     return pending_login_managers_;
   }
@@ -267,7 +266,7 @@
   // When a form is "seen" on a page, a PasswordFormManager is created
   // and stored in this collection until user navigates away from page.
 
-  std::vector<scoped_refptr<PasswordFormManager>> pending_login_managers_;
+  std::vector<std::unique_ptr<PasswordFormManager>> pending_login_managers_;
 
   // When the user submits a password/credential, this contains the
   // PasswordFormManager for the form in question until we deem the login
@@ -275,7 +274,7 @@
   // send the PasswordFormManager back to the pending_login_managers_ set.
   // Scoped in case PasswordManager gets deleted (e.g tab closes) between the
   // time a user submits a login form and gets to the next page.
-  scoped_refptr<PasswordFormManager> provisional_save_manager_;
+  std::unique_ptr<PasswordFormManager> provisional_save_manager_;
 
   // The embedder-level client. Must outlive this class.
   PasswordManagerClient* const client_;