Adding XMPP ping functionality to CLoudPrint. XMPP ping and timeout is controlled thorugh Service S…

jingle/notifier/listener/xmpp_push_client.h

Index: jingle/notifier/listener/xmpp_push_client.h
diff --git a/jingle/notifier/listener/xmpp_push_client.h b/jingle/notifier/listener/xmpp_push_client.h
index 64725d8601b37797997ee9b2bd86bc22d0aa7627..6a5986dbcfedd22b5038f165ed23a3dbecdee065 100644
--- a/jingle/notifier/listener/xmpp_push_client.h
+++ b/jingle/notifier/listener/xmpp_push_client.h
@@ -49,6 +49,7 @@ class XmppPushClient :
   virtual void UpdateCredentials(
       const std::string& email, const std::string& token) OVERRIDE;
   virtual void SendNotification(const Notification& notification) OVERRIDE;
+  virtual void SendPing() OVERRIDE;
 
   // Login::Delegate implementation.
   virtual void OnConnect(
@@ -59,6 +60,7 @@ class XmppPushClient :
   // PushNotificationsListenTaskDelegate implementation.
   virtual void OnNotificationReceived(
       const Notification& notification) OVERRIDE;
+  virtual void OnPingResponseReceived() OVERRIDE;
 
   // PushNotificationsSubscribeTaskDelegate implementation.
   virtual void OnSubscribed() OVERRIDE;