Add a basic functionality to the force-saving menu item.

components/password_manager/core/browser/password_manager.cc

Index: components/password_manager/core/browser/password_manager.cc
diff --git a/components/password_manager/core/browser/password_manager.cc b/components/password_manager/core/browser/password_manager.cc
index 1fd7d7744a2551283713f769d40c811dfbfa42b8..3375a3e8b5ef50bb9c11a72a8971135f9ca9f3a4 100644
--- a/components/password_manager/core/browser/password_manager.cc
+++ b/components/password_manager/core/browser/password_manager.cc
@@ -359,6 +359,16 @@ void PasswordManager::OnPasswordFormSubmitted(
   pending_login_managers_.clear();
 }
 
+void PasswordManager::OnPasswordFormForceSaveRequested(
+    password_manager::PasswordManagerDriver* driver,
+    const PasswordForm& password_form) {
+  // TODO(msramek): This is just a sketch. We will need to show a custom bubble,
+  // mark the form as force saved, and recreate the pending login managers,
+  // because the password store might have changed.
+  ProvisionallySavePassword(password_form);
+  AskUserOrSavePassword();
+}
+
 void PasswordManager::OnPasswordFormsParsed(
     password_manager::PasswordManagerDriver* driver,
     const std::vector<PasswordForm>& forms) {