diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index ec97db2..4b55e32 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -96,16 +96,13 @@ function theme_get_registry($complete = TRUE) {
 /**
  * Returns an array of default theme features.
  *
- * @see \Drupal\Core\Extension\ThemeHandler::$defaultFeatures
+ * @see \Drupal\Core\Theme\ThemeSettings::defaults()
+ *
+ * @deprecated in Drupal 8.2.x, will be removed before Drupal 9.0.0.
+ *   Use \Drupal\Core\Theme\ThemeSettings::defaults() instead.
  */
 function _system_default_theme_features() {
-  return array(
-    'favicon',
-    'logo',
-    'node_user_picture',
-    'comment_user_picture',
-    'comment_user_verification',
-  );
+  return ThemeSettings::defaults();
 }
 
 /**
@@ -333,7 +330,7 @@ function theme_get_setting($setting_name, $theme = NULL) {
       // If the theme does not support a particular feature, override the global
       // setting and set the value to NULL.
       if (!empty($theme_object->info['features'])) {
-        foreach (_system_default_theme_features() as $feature) {
+        foreach (ThemeSettings::defaults() as $feature) {
           if (!in_array($feature, $theme_object->info['features'])) {
             $cache[$theme]->set('features.' . $feature, NULL);
           }
diff --git a/core/lib/Drupal/Core/Extension/ThemeHandler.php b/core/lib/Drupal/Core/Extension/ThemeHandler.php
index 8c573bb..3be02e7 100644
--- a/core/lib/Drupal/Core/Extension/ThemeHandler.php
+++ b/core/lib/Drupal/Core/Extension/ThemeHandler.php
@@ -4,6 +4,7 @@
 
 use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\State\StateInterface;
+use Drupal\Core\Theme\ThemeSettings;
 
 /**
  * Default theme handler using the config system to store installation statuses.
@@ -11,21 +12,6 @@
 class ThemeHandler implements ThemeHandlerInterface {
 
   /**
-   * Contains the features enabled for themes by default.
-   *
-   * @var array
-   *
-   * @see _system_default_theme_features()
-   */
-  protected $defaultFeatures = array(
-    'favicon',
-    'logo',
-    'node_user_picture',
-    'comment_user_picture',
-    'comment_user_verification',
-  );
-
-  /**
    * A list of all currently available themes.
    *
    * @var array
@@ -266,7 +252,7 @@ public function rebuildThemeData() {
         'breadcrumb' => 'Breadcrumb',
       ),
       'description' => '',
-      'features' => $this->defaultFeatures,
+      'features' => ThemeSettings::defaults(),
       'screenshot' => 'screenshot.png',
       'php' => DRUPAL_MINIMUM_PHP,
       'libraries' => array(),
diff --git a/core/lib/Drupal/Core/Theme/ThemeSettings.php b/core/lib/Drupal/Core/Theme/ThemeSettings.php
index 9cae321..63dac38 100644
--- a/core/lib/Drupal/Core/Theme/ThemeSettings.php
+++ b/core/lib/Drupal/Core/Theme/ThemeSettings.php
@@ -49,4 +49,19 @@ public function getCacheTags() {
     return ['rendered'];
   }
 
+  /**
+   * Returns the features enabled for themes by default.
+   *
+   * @return string[]
+   */
+  public static function defaults() {
+    return [
+      'favicon',
+      'logo',
+      'node_user_picture',
+      'comment_user_picture',
+      'comment_user_verification',
+    ];
+  }
+
 }