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 c180e97a30274d0d036ed6310343a0f737c428c0..fbfae1b329425e96a45375871cc09b6b0982f81f 100644
--- a/components/password_manager/core/browser/password_manager.cc
+++ b/components/password_manager/core/browser/password_manager.cc
@@ -382,6 +382,16 @@ 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) {