Submit handler to break_lock a view.
public function submitBreakLock(&$form, &$form_state) {
drupal_container()
->get('user.tempstore')
->get('views')
->delete($this
->get('name'));
$form_state['redirect'] = 'admin/structure/views/view/' . $this
->get('name') . '/edit';
drupal_set_message(t('The lock has been broken and you may now edit this view.'));
}