diff -u b/core/includes/install.core.inc b/core/includes/install.core.inc
--- b/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -368,7 +368,8 @@
       ->addArgument('cache');
     $container
       ->register('theme.registry', 'Drupal\Core\Theme\Registry')
-      ->addArgument(new Reference('cache.theme'));
+      ->addArgument(new Reference('cache.theme'))
+      ->addArgument(new Reference('module_handler'));
 
     // Register a module handler for managing enabled modules.
     $container
diff -u b/core/lib/Drupal/Core/CoreBundle.php b/core/lib/Drupal/Core/CoreBundle.php
--- b/core/lib/Drupal/Core/CoreBundle.php
+++ b/core/lib/Drupal/Core/CoreBundle.php
@@ -208,7 +208,8 @@
       ->addArgument('cache');
     $container
       ->register('theme.registry', 'Drupal\Core\Theme\Registry')
-      ->addArgument(new Reference('cache.theme'));
+      ->addArgument(new Reference('cache.theme'))
+      ->addArgument(new Reference('module_handler'));
 
     $this->registerTwig($container);
     $this->registerRouting($container);
diff -u b/core/lib/Drupal/Core/Theme/Registry.php b/core/lib/Drupal/Core/Theme/Registry.php
--- b/core/lib/Drupal/Core/Theme/Registry.php
+++ b/core/lib/Drupal/Core/Theme/Registry.php
@@ -9,6 +9,7 @@
 
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Utility\ThemeRegistry;
 
 /**
@@ -92,24 +93,33 @@
   protected $cache;
 
   /**
+   * The module handler to use to load modules.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
    * The incomplete, runtime theme registry.
    *
    * @var \Drupal\Core\Utility\ThemeRegistry
    */
   protected $runtimeRegistry;
 
+
   /**
    * Constructs a new theme registry instance.
    *
    * @param \Drupal\Core\Cache\CacheBackendInterface $cache
    *   The cache backend interface to use for the complete theme registry data.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler to use to load modules.
    * @param string $theme_name
    *   (optional) The name of the theme for which to construct the registry.
-   *
-   * @todo Inject new ModuleHandler.
    */
-  public function __construct(CacheBackendInterface $cache, $theme_name = NULL) {
+  public function __construct(CacheBackendInterface $cache, ModuleHandlerInterface $module_handler, $theme_name = NULL) {
     $this->cache = $cache;
+    $this->moduleHandler = $module_handler;
     $this->init($theme_name);
   }
 
@@ -219,7 +229,7 @@
     else {
       $this->registry = $this->build();
       // Only persist it if all modules are loaded to ensure it is complete.
-      if (\Drupal::service('module_handler')->loadAll()) {
+      if ($this->moduleHandler->loadAll()) {
         $this->setCache();
       }
     }
@@ -284,12 +294,12 @@
       $registry = $cache->data;
     }
     else {
-      foreach (module_implements('theme') as $module) {
+      foreach ($this->moduleHandler->getImplementations('theme') as $module) {
         $this->processExtension($registry, 'module', $module, $module, drupal_get_path('module', $module));
       }
       // Only persist it if all modules are loaded to ensure it is complete.
       // @todo Get rid of these checks.
-      if (\Drupal::service('module_handler')->loadAll()) {
+      if ($this->moduleHandler->loadAll()) {
         $this->cache->set("theme_registry:build:modules", $registry, CacheBackendInterface::CACHE_PERMANENT, array('theme_registry' => TRUE));
       }
     }
@@ -311,7 +321,7 @@
     $this->processExtension($registry, 'theme', $this->theme->name, $this->theme->name, dirname($this->theme->uri));
 
     // Allow modules to alter the complete registry.
-    drupal_alter('theme_registry', $registry);
+    $this->moduleHandler->alter('theme_registry', $registry);
 
     $this->registry = $registry;
     $this->compile();
@@ -647,7 +657,7 @@
    */
   protected function getHookImplementations($hook) {
     $implementations = array();
-    foreach (module_implements($hook) as $module) {
+    foreach ($this->moduleHandler->getImplementations($hook) as $module) {
       $function = $module . '_' . $hook;
       $implementations[$function] = $function;
     };
diff -u b/core/modules/views/views_ui/views_ui.module b/core/modules/views/views_ui/views_ui.module
--- b/core/modules/views/views_ui/views_ui.module
+++ b/core/modules/views/views_ui/views_ui.module
@@ -123,11 +123,13 @@
       'variables' => array('description' => '', 'link' => '', 'settings_links' => array(), 'overridden' => FALSE, 'defaulted' => FALSE, 'description_separator' => TRUE, 'class' => array()),
       'template' => 'views-ui-display-tab-setting',
       'file' => 'views_ui.theme.inc',
+      'preprocess' => array('template_preprocess_views_ui_display_tab_setting'),
     ),
     'views_ui_display_tab_bucket' => array(
       'render element' => 'element',
       'template' => 'views-ui-display-tab-bucket',
       'file' => 'views_ui.theme.inc',
+      'preprocess' => array('template_preprocess_views_ui_display_tab_bucket'),
     ),
     'views_ui_rearrange_form' => array(
       'render element' => 'form',
@@ -146,6 +148,7 @@
     'views_ui_view_info' => array(
       'variables' => array('view' => NULL, 'base' => NULL),
       'file' => 'views_ui.theme.inc',
+      'preprocess' => array('template_preprocess_views_ui_view_info'),
     ),
 
     // Group of filters.
@@ -176,6 +179,7 @@
     'views_ui_view_preview_section' => array(
       'variables' => array('view' => NULL, 'section' => NULL, 'content' => NULL, 'links' => ''),
       'file' => 'views_ui.theme.inc',
+      'preprocess' => array('template_preprocess_views_ui_view_preview_section'),
     ),
 
     // Generic container wrapper, to use instead of theme_container when an id