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

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 78056316518ebd3d7431641b4ad4b6ebe14ea271..b78a1813776af1fe9591c3022d685ad2555ceec5 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1911,6 +1911,10 @@ const char kCloudPrintRobotRefreshToken[] = "cloud_print.robot_refresh_token";
 const char kCloudPrintRobotEmail[] = "cloud_print.robot_email";
 // A boolean indicating whether we should connect to cloud print new printers.
 const char kCloudPrintConnectNewPrinters[] = "cloud_print.connect_new_printers";
+// A boolean indicating whether we should ping XMPP connection.
+const char kCloudPrintXmppPingEnabled[] = "cloud_print.xmpp_ping_enabled";
+// An int value indicating the average timeout between xmpp pings.
+const char kCloudPrintXmppPingTimeout[] = "cloud_print.xmpp_ping_timeout_sec";
 // List of printers which should not be connected.
 const char kCloudPrintPrinterBlacklist[] = "cloud_print.printer_blacklist";
 // A boolean indicating whether submitting jobs to Google Cloud Print is