removed unneeded safeguard as it's already done during compilation

src/Symfony/Bridge/Twig/Extension/StopwatchExtension.php

@@ -28,6 +28,11 @@ class StopwatchExtension extends \Twig_Extension
         $this->stopwatch = $stopwatch;
     }
 
+    public function getStopwatch()
+    {
+        return $this->stopwatch;
+    }
+
     public function getTokenParsers()
     {
         return array(
@@ -44,18 +49,4 @@ class StopwatchExtension extends \Twig_Extension
     {
         return 'stopwatch';
     }
-
-    public function startEvent($name)
-    {
-        if ($this->stopwatch instanceof Stopwatch) {
-            $this->stopwatch->start($name, 'template');
-        }
-    }
-
-    public function stopEvent($name)
-    {
-        if ($this->stopwatch instanceof Stopwatch) {
-            $this->stopwatch->stop($name);
-        }
-    }
 }

src/Symfony/Bridge/Twig/Node/StopwatchNode.php

@@ -25,12 +25,10 @@ class StopwatchNode extends \Twig_Node
 
     public function compile(\Twig_Compiler $compiler)
     {
-        $name = $this->getAttribute('name');
-
         $compiler
-            ->write('$this->env->getExtension(\'stopwatch\')->startEvent(\''.$name.'\');')
+            ->write(sprintf("\$this->env->getExtension('stopwatch')->getStopwatch()->start('%s', 'template');\n", $this->getAttribute('name')))
             ->subcompile($this->getNode('body'))
-            ->write('$this->env->getExtension(\'stopwatch\')->stopEvent(\''.$name.'\');')
+            ->write(sprintf("\$this->env->getExtension('stopwatch')->getStopwatch()->stop('%s');\n", $this->getAttribute('name')))
-            ->raw("\n");
+        ;
     }
 }