Merge branch '2.3'

* 2.3:
  [HttpKernel] Added a missing use statement.
  [Process] Increased the timeout in a test to prevent random failures when travis is under a heavy load.

src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\HttpKernel\Fragment;
 
+use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\StreamedResponse;
 use Symfony\Component\HttpKernel\Controller\ControllerReference;

src/Symfony/Component/Process/Tests/AbstractProcessTest.php

@@ -62,7 +62,7 @@ abstract class AbstractProcessTest extends \PHPUnit_Framework_TestCase
         }
         $duration = microtime(true) - $start;
 
-        $this->assertLessThan(1.3, $duration);
+        $this->assertLessThan(1.8, $duration);
     }
 
     /**