Clean up logging for push_notifications_*.cc

jingle/notifier/listener/push_notifications_send_update_task.cc

Index: jingle/notifier/listener/push_notifications_send_update_task.cc
diff --git a/jingle/notifier/listener/push_notifications_send_update_task.cc b/jingle/notifier/listener/push_notifications_send_update_task.cc
index d669a37f3fc535d795d0d8b4c11bca545356e1f0..50ec15e3cf45ab58336d26730ba77e533cc07b25 100644
--- a/jingle/notifier/listener/push_notifications_send_update_task.cc
+++ b/jingle/notifier/listener/push_notifications_send_update_task.cc
@@ -29,8 +29,8 @@ int PushNotificationsSendUpdateTask::ProcessStart() {
   scoped_ptr<buzz::XmlElement> stanza(
       MakeUpdateMessage(notification_,
                         GetClient()->jid().BareJid()));
-  VLOG(1) << "Sending notification " << notification_.ToString()
-          << " as stanza " << XmlElementToString(*stanza);
+  DVLOG(1) << "Sending notification " << notification_.ToString()
+           << " as stanza " << XmlElementToString(*stanza);
   if (SendStanza(stanza.get()) != buzz::XMPP_RETURN_OK) {
     LOG(WARNING) << "Could not send stanza " << XmlElementToString(*stanza);
   }