Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/http-kernel/Controller/TraceableControllerResolver.php

@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Controller;
+
+use Symfony\Component\Stopwatch\Stopwatch;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * TraceableControllerResolver.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class TraceableControllerResolver implements ControllerResolverInterface
+{
+    private $resolver;
+    private $stopwatch;
+
+    /**
+     * Constructor.
+     *
+     * @param ControllerResolverInterface $resolver  A ControllerResolverInterface instance
+     * @param Stopwatch                   $stopwatch A Stopwatch instance
+     */
+    public function __construct(ControllerResolverInterface $resolver, Stopwatch $stopwatch)
+    {
+        $this->resolver = $resolver;
+        $this->stopwatch = $stopwatch;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getController(Request $request)
+    {
+        $e = $this->stopwatch->start('controller.get_callable');
+
+        $ret = $this->resolver->getController($request);
+
+        $e->stop();
+
+        return $ret;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getArguments(Request $request, $controller)
+    {
+        $e = $this->stopwatch->start('controller.get_arguments');
+
+        $ret = $this->resolver->getArguments($request, $controller);
+
+        $e->stop();
+
+        return $ret;
+    }
+}