commit 6e4a1240c92f30e5a76e058b1e5070e378d3f522
Author: Andy Postnikov <andypost@ya.ru>
Date:   Thu Sep 27 23:20:55 2012 +0700

    Fix after #1785974

diff --git a/core/modules/contact/contact.admin.inc b/core/modules/contact/contact.admin.inc
index fec9d4c..24c1d10 100644
--- a/core/modules/contact/contact.admin.inc
+++ b/core/modules/contact/contact.admin.inc
@@ -22,7 +22,7 @@ function contact_category_list() {
   $rows = array();
 
   $categories = entity_load_multiple('contact_category');
-  uasort($categories, 'Drupal\config\ConfigEntityBase::sort');
+  uasort($categories, 'Drupal\Core\Config\Entity\ConfigEntityBase::sort');
   $default_category = config('contact.settings')->get('default_category');
 
   // Loop through the categories and add them to the table.
diff --git a/core/modules/contact/contact.module b/core/modules/contact/contact.module
index c8b1bd2..e61bb56 100644
--- a/core/modules/contact/contact.module
+++ b/core/modules/contact/contact.module
@@ -203,7 +203,7 @@ function contact_entity_info() {
   $types['contact_category'] = array(
     'label' => 'Category',
     'entity class' => 'Drupal\contact\Category',
-    'controller class' => 'Drupal\config\ConfigStorageController',
+    'controller class' => 'Drupal\Core\Config\Entity\ConfigStorageController',
     'form controller class' => array(
       'default' => 'Drupal\contact\CategoryFormController',
     ),
diff --git a/core/modules/contact/contact.pages.inc b/core/modules/contact/contact.pages.inc
index d84da57..bfea6c5 100644
--- a/core/modules/contact/contact.pages.inc
+++ b/core/modules/contact/contact.pages.inc
@@ -41,7 +41,7 @@ function contact_site_form($form, &$form_state) {
   }
 
   // Prepare array for select options.
-  uasort($categories, 'Drupal\config\ConfigEntityBase::sort');
+  uasort($categories, 'Drupal\Core\Config\Entity\ConfigEntityBase::sort');
   $options = array();
   foreach ($categories as $category) {
     $options[$category->id()] = $category->label();
diff --git a/core/modules/contact/lib/Drupal/contact/Category.php b/core/modules/contact/lib/Drupal/contact/Category.php
index 31d95aa..1a34479 100644
--- a/core/modules/contact/lib/Drupal/contact/Category.php
+++ b/core/modules/contact/lib/Drupal/contact/Category.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\contact;
 
-use Drupal\config\ConfigEntityBase;
+use Drupal\Core\Config\Entity\ConfigEntityBase;
 
 /**
  * Defines the contact category entity.