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

chrome/service/cloud_print/cloud_print_consts.h

Index: chrome/service/cloud_print/cloud_print_consts.h
diff --git a/chrome/service/cloud_print/cloud_print_consts.h b/chrome/service/cloud_print/cloud_print_consts.h
index 2d9254eba4bfa1f18ec367ea0559ef5a2a00f360..b5fb24c6aeb27b22092bbd23fa9dc5b80d939fab 100644
--- a/chrome/service/cloud_print/cloud_print_consts.h
+++ b/chrome/service/cloud_print/cloud_print_consts.h
@@ -64,6 +64,15 @@ const int kCloudPrintAuthMaxRetryCount = -1;
 const int kMinJobPollIntervalSecs = 5*60;  // 5 minutes in seconds
 const int kMaxJobPollIntervalSecs = 8*60;  // 8 minutes in seconds
 
+// When we have XMPP notifications available, we ping server to keep connection
+// alive or check connection status.
+const int kDefaultXmppPingTimeoutSecs = 5*60;  // 5 minutes in seconds
+const int kMinimumXmppPingTimeoutSecs = 2*60;  // 2 minutes in seconds
+const int kXmppPingCheckIntervalSecs = 60;
+
+// Number of failed pings before we try to reinstablish XMPP connection.
+const int kMaxFailedXmppPings = 2;
+
 // The number of seconds before the OAuth2 access token is due to expire that
 // we try and refresh it.
 const int kTokenRefreshGracePeriodSecs = 5*60;  // 5 minutes in seconds