[Password Manager] Presave the form with generated password till successful login

components/password_manager/core/browser/password_form_manager.h

Index: components/password_manager/core/browser/password_form_manager.h
diff --git a/components/password_manager/core/browser/password_form_manager.h b/components/password_manager/core/browser/password_form_manager.h
index 0cf54a306af532f33ed821eb5060f414baef258d..c3421b881075d8460c08f2d2de68ef7a21371807 100644
--- a/components/password_manager/core/browser/password_form_manager.h
+++ b/components/password_manager/core/browser/password_form_manager.h
@@ -254,6 +254,15 @@ class PasswordFormManager : public PasswordStoreConsumer {
   // Called when the user didn't interact with Update UI.
   void OnNoInteractionOnUpdate();
 
+  // Called when the user accepts a generated password or change it.
+  void PresaveGeneratedPassword(const autofill::PasswordForm& form);
+
+  // Called when the user removes the generated password.
+  void RemovePresavedPassword();
+
+  // Called after successful login on the form with a generated password.
+  void ReplacePresavedPasswordWithPendingCredentials(PasswordStore* store);
+
  private:
   // ManagerAction - What does the manager do with this form? Either it
   // fills it, or it doesn't. If it doesn't fill it, that's either
@@ -493,6 +502,10 @@ class PasswordFormManager : public PasswordStoreConsumer {
   // |provisionally_saved_form_| and |best_matches_|.
   autofill::PasswordForm pending_credentials_;
 
+  // Stores the form with generated password till the user makes successful
+  // login or removes the generated password.
+  std::unique_ptr<autofill::PasswordForm> presaved_form_;
+
   // Whether pending_credentials_ stores a new login or is an update
   // to an existing one.
   bool is_new_login_;