[Chromoting] Add platform data to heartbeats.

remoting/host/server_log_entry.h

Index: remoting/host/server_log_entry.h
diff --git a/remoting/host/server_log_entry.h b/remoting/host/server_log_entry.h
index 8e5be839740fe347d7ecfcd37905382f9bb6b5fa..f1af9bd86935da9ad96222abea077bc67cebab2c 100644
--- a/remoting/host/server_log_entry.h
+++ b/remoting/host/server_log_entry.h
@@ -25,10 +25,18 @@ class ServerLogEntry {
     ME2ME
   };
 
+  // Constructs a log stanza. The caller should add one or more log entry
+  // stanzas as children of this stanza, before sending the log stanza to
+  // the remoting bot.
+  static scoped_ptr<buzz::XmlElement> MakeStanza();
+
   // Constructs a log entry for a session state change.
   // Currently this is either connection or disconnection.
   static ServerLogEntry* MakeSessionStateChange(bool connection);
 
+  // Constructs a log entry for a heartbeat.
+  static ServerLogEntry* MakeForHeartbeat();
+
   ~ServerLogEntry();
 
   // Adds fields describing the host to this log entry.