diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorCategoryBlock.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorCategoryBlock.php
index c9fe040..c672ede 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorCategoryBlock.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorCategoryBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides an 'Aggregator category' block for the latest items in a category.
@@ -36,9 +37,9 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
+  public function access(AccountInterface $account) {
     // Only grant access to users with the 'access news feeds' permission.
-    return user_access('access news feeds');
+    return $account->hasPermission('access news feeds');
   }
 
   /**
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php
index 4b002a2..d5b3d3d 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides an 'Aggregator feed' block with the latest items from the feed.
@@ -36,9 +37,9 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
+  public function access(AccountInterface $account) {
     // Only grant access to users with the 'access news feeds' permission.
-    return user_access('access news feeds');
+    return $account->hasPermission('access news feeds');
   }
 
   /**
diff --git a/core/modules/block/lib/Drupal/block/BlockAccessController.php b/core/modules/block/lib/Drupal/block/BlockAccessController.php
index a4827e5..d28919b 100644
--- a/core/modules/block/lib/Drupal/block/BlockAccessController.php
+++ b/core/modules/block/lib/Drupal/block/BlockAccessController.php
@@ -30,7 +30,7 @@ protected function checkAccess(EntityInterface $entity, $operation, $langcode, A
     }
 
     // If the plugin denies access, then deny access.
-    if (!$entity->getPlugin()->access()) {
+    if (!$entity->getPlugin()->access($account)) {
       return FALSE;
     }
 
diff --git a/core/modules/block/lib/Drupal/block/BlockBase.php b/core/modules/block/lib/Drupal/block/BlockBase.php
index f1217c0..4e41071 100644
--- a/core/modules/block/lib/Drupal/block/BlockBase.php
+++ b/core/modules/block/lib/Drupal/block/BlockBase.php
@@ -11,6 +11,7 @@
 use Drupal\block\BlockInterface;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Language\Language;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Defines a base block implementation that most blocks plugins will extend.
@@ -75,7 +76,7 @@ public function setConfigurationValue($key, $value) {
   /**
    * {@inheritdoc}
    */
-  public function access() {
+  public function access(AccountInterface $account = null) {
     // By default, the block is visible unless user-configured rules indicate
     // that it should be hidden.
     return TRUE;
diff --git a/core/modules/block/lib/Drupal/block/BlockPluginInterface.php b/core/modules/block/lib/Drupal/block/BlockPluginInterface.php
index 5f353a4..83f64dc 100644
--- a/core/modules/block/lib/Drupal/block/BlockPluginInterface.php
+++ b/core/modules/block/lib/Drupal/block/BlockPluginInterface.php
@@ -10,6 +10,7 @@
 use Drupal\Component\Plugin\PluginInspectionInterface;
 use Drupal\Component\Plugin\ConfigurablePluginInterface;
 use Drupal\Core\Plugin\PluginFormInterface;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Defines the required interface for all block plugins.
@@ -39,12 +40,14 @@ public function settings();
    * This method allows base implementations to add general access restrictions
    * that should apply to all extending block plugins.
    *
+   * @param \Drupal\Core\Session\AccountInterface $account
+   *   The Account Interface.
    * @return bool
    *   TRUE if the block should be shown, or FALSE otherwise.
    *
    * @see \Drupal\block\BlockAccessController
    */
-  public function access();
+  public function access(AccountInterface $account);
 
   /**
    * Builds and returns the renderable array for this block plugin.
diff --git a/core/modules/block/tests/modules/block_test/lib/Drupal/block_test/Plugin/Block/TestBlockInstantiation.php b/core/modules/block/tests/modules/block_test/lib/Drupal/block_test/Plugin/Block/TestBlockInstantiation.php
index 4c28638..184107a 100644
--- a/core/modules/block/tests/modules/block_test/lib/Drupal/block_test/Plugin/Block/TestBlockInstantiation.php
+++ b/core/modules/block/tests/modules/block_test/lib/Drupal/block_test/Plugin/Block/TestBlockInstantiation.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a basic block for testing block instantiation and configuration.
@@ -34,8 +35,8 @@ public function settings() {
   /**
    * {@inheritdoc}
    */
-  public function access() {
-    return user_access('access content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access content');
   }
 
   /**
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/Block/RecentCommentsBlock.php b/core/modules/comment/lib/Drupal/comment/Plugin/Block/RecentCommentsBlock.php
index cf442db..2bc2ec3 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/Block/RecentCommentsBlock.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/Block/RecentCommentsBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'Recent comments' block.
@@ -34,8 +35,8 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('access comments');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access comments');
   }
 
   /**
diff --git a/core/modules/forum/lib/Drupal/forum/Plugin/Block/ForumBlockBase.php b/core/modules/forum/lib/Drupal/forum/Plugin/Block/ForumBlockBase.php
index cbdfc79..7b9f4ee 100644
--- a/core/modules/forum/lib/Drupal/forum/Plugin/Block/ForumBlockBase.php
+++ b/core/modules/forum/lib/Drupal/forum/Plugin/Block/ForumBlockBase.php
@@ -8,6 +8,7 @@
 namespace Drupal\forum\Plugin\Block;
 
 use Drupal\block\BlockBase;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a base class for Forum blocks.
@@ -30,8 +31,8 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('access content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access content');
   }
 
   /**
diff --git a/core/modules/language/lib/Drupal/language/Plugin/Block/LanguageBlock.php b/core/modules/language/lib/Drupal/language/Plugin/Block/LanguageBlock.php
index fa8a249..77353d1 100644
--- a/core/modules/language/lib/Drupal/language/Plugin/Block/LanguageBlock.php
+++ b/core/modules/language/lib/Drupal/language/Plugin/Block/LanguageBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'Language switcher' block.
@@ -26,7 +27,7 @@ class LanguageBlock extends BlockBase {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  function access() {
+  function access(AccountInterface $account) {
     return language_multilingual();
   }
 
diff --git a/core/modules/node/lib/Drupal/node/Plugin/Block/RecentContentBlock.php b/core/modules/node/lib/Drupal/node/Plugin/Block/RecentContentBlock.php
index 8144161..269ef29 100644
--- a/core/modules/node/lib/Drupal/node/Plugin/Block/RecentContentBlock.php
+++ b/core/modules/node/lib/Drupal/node/Plugin/Block/RecentContentBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'Recent content' block.
@@ -34,8 +35,8 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('access content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access content');
   }
 
   /**
diff --git a/core/modules/node/lib/Drupal/node/Plugin/Block/SyndicateBlock.php b/core/modules/node/lib/Drupal/node/Plugin/Block/SyndicateBlock.php
index 1440a48..9b20d78 100644
--- a/core/modules/node/lib/Drupal/node/Plugin/Block/SyndicateBlock.php
+++ b/core/modules/node/lib/Drupal/node/Plugin/Block/SyndicateBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'Syndicate' block that links to the site's RSS feed.
@@ -34,8 +35,8 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('access content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access content');
   }
 
   /**
diff --git a/core/modules/search/lib/Drupal/search/Plugin/Block/SearchBlock.php b/core/modules/search/lib/Drupal/search/Plugin/Block/SearchBlock.php
index b692e5e..29623c6 100644
--- a/core/modules/search/lib/Drupal/search/Plugin/Block/SearchBlock.php
+++ b/core/modules/search/lib/Drupal/search/Plugin/Block/SearchBlock.php
@@ -12,6 +12,7 @@
 use Drupal\Core\Annotation\Translation;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\search\Form\SearchBlockForm;
+use Drupal\Core\Session\AccountInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Request;
 
@@ -45,8 +46,8 @@ public function __construct(array $configuration, $plugin_id, array $plugin_defi
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('search content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('search content');
   }
 
   /**
diff --git a/core/modules/statistics/lib/Drupal/statistics/Plugin/Block/StatisticsPopularBlock.php b/core/modules/statistics/lib/Drupal/statistics/Plugin/Block/StatisticsPopularBlock.php
index d11412e..b34d375 100644
--- a/core/modules/statistics/lib/Drupal/statistics/Plugin/Block/StatisticsPopularBlock.php
+++ b/core/modules/statistics/lib/Drupal/statistics/Plugin/Block/StatisticsPopularBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'Popular content' block.
@@ -57,8 +58,8 @@ public function settings() {
     /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    if (user_access('access content')) {
+  public function access(AccountInterface $account) {
+    if ($account->hasPermission('access content')) {
       $daytop = $this->configuration['top_day_num'];
       if (!$daytop || !($result = statistics_title_list('daycount', $daytop)) || !($this->day_list = node_title_list($result, t("Today's:")))) {
         return FALSE;
diff --git a/core/modules/system/lib/Drupal/system/Plugin/Block/SystemHelpBlock.php b/core/modules/system/lib/Drupal/system/Plugin/Block/SystemHelpBlock.php
index c19a575..87383d4 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/Block/SystemHelpBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/Block/SystemHelpBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'System Help' block.
@@ -32,7 +33,7 @@ class SystemHelpBlock extends BlockBase {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
+  public function access(AccountInterface $account = null) {
     $this->help = menu_get_active_help();
     return (bool) $this->help;
   }
diff --git a/core/modules/system/lib/Drupal/system/Plugin/Block/SystemMenuBlock.php b/core/modules/system/lib/Drupal/system/Plugin/Block/SystemMenuBlock.php
index 1daf4bf..8972bb6 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/Block/SystemMenuBlock.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/Block/SystemMenuBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'System Menu' block.
@@ -26,10 +27,10 @@ class SystemMenuBlock extends BlockBase {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
+  public function access(AccountInterface $account) {
     // @todo The 'Tools' menu should be available to anonymous users.
     list($plugin, $derivative) = explode(':', $this->getPluginId());
-    return ($GLOBALS['user']->isAuthenticated() || in_array($derivative, array('menu-main', 'menu-tools', 'menu-footer')));
+    return ($account->isAuthenticated() || in_array($derivative, array('menu-main', 'menu-tools', 'menu-footer')));
   }
 
   /**
diff --git a/core/modules/user/lib/Drupal/user/Plugin/Block/UserLoginBlock.php b/core/modules/user/lib/Drupal/user/Plugin/Block/UserLoginBlock.php
index ab4401c..13246e1 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/Block/UserLoginBlock.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/Block/UserLoginBlock.php
@@ -15,6 +15,7 @@
 use Symfony\Component\DependencyInjection\ContainerAwareInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Request;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a 'User login' block.
@@ -78,8 +79,8 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return (!$GLOBALS['user']->id() && !(arg(0) == 'user' && !is_numeric(arg(1))));
+  public function access(AccountInterface $account) {
+    return (!$account->id() && !(arg(0) == 'user' && !is_numeric(arg(1))));
   }
 
   /**
diff --git a/core/modules/user/lib/Drupal/user/Plugin/Block/UserNewBlock.php b/core/modules/user/lib/Drupal/user/Plugin/Block/UserNewBlock.php
index 26be5ba..fb7360c 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/Block/UserNewBlock.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/Block/UserNewBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a "Who's new" block.
@@ -37,8 +38,8 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('access content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access content');
   }
 
   /**
diff --git a/core/modules/user/lib/Drupal/user/Plugin/Block/UserOnlineBlock.php b/core/modules/user/lib/Drupal/user/Plugin/Block/UserOnlineBlock.php
index 3f5b0b2..601c36d 100644
--- a/core/modules/user/lib/Drupal/user/Plugin/Block/UserOnlineBlock.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/Block/UserOnlineBlock.php
@@ -10,6 +10,7 @@
 use Drupal\block\BlockBase;
 use Drupal\Component\Annotation\Plugin;
 use Drupal\Core\Annotation\Translation;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Provides a "Who's online" block.
@@ -41,8 +42,8 @@ public function settings() {
   /**
    * Overrides \Drupal\block\BlockBase::access().
    */
-  public function access() {
-    return user_access('access content');
+  public function access(AccountInterface $account) {
+    return $account->hasPermission('access content');
   }
 
   /**
diff --git a/core/modules/views/lib/Drupal/views/Plugin/Block/ViewsBlockBase.php b/core/modules/views/lib/Drupal/views/Plugin/Block/ViewsBlockBase.php
index b90b3e6..6b1f6a9 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/Block/ViewsBlockBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/Block/ViewsBlockBase.php
@@ -12,6 +12,7 @@
 use Drupal\views\ViewExecutableFactory;
 use Drupal\Core\Entity\EntityStorageControllerInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Session\AccountInterface;
 
 /**
  * Base class for Views block plugins.
@@ -79,7 +80,7 @@ public static function create(ContainerInterface $container, array $configuratio
   /**
    * {@inheritdoc}
    */
-  public function access() {
+  public function access(AccountInterface $account) {
     return $this->view->access($this->displayID);
   }