Call to deprecated function drupal_get_path()

Function drupal_get_path() is deprecated. 

Use Drupal\Core\Extension\ExtensionPathResolver::getPath() in your service or controller. 
 

Before:

$module_path = drupal_get_path('module', 'node');
$theme_path = drupal_get_path('theme', 'seven');
$profile_path = drupal_get_path('profile', 'standard');

After:

$module_path = \Drupal::service('extension.list.module')->getPath('node');
$theme_path = \Drupal::service('extension.list.theme')->getPath('seven');
$profile_path = \Drupal::service('extension.list.profile')->getPath('standard');