[Mailer] added support for the profiler

Author: fabpot

Resources/config/mailer_debug.xml

@@ -8,5 +8,10 @@
         <service id="mailer.logger_message_listener" class="Symfony\Component\Mailer\EventListener\MessageLoggerListener">
             <tag name="kernel.event_subscriber"/>
         </service>
+
+       <service id="mailer.data_collector" class="Symfony\Component\Mailer\DataCollector\MessageDataCollector">
+            <argument type="service" id="mailer.logger_message_listener" />
+            <tag name="data_collector" template="@WebProfiler/Collector/mailer.html.twig" id="mailer" />
+        </service>
     </services>
 </container>