[Chromoting] Plugin message in JingleMessage

remoting/protocol/jingle_messages.h

Index: remoting/protocol/jingle_messages.h
diff --git a/remoting/protocol/jingle_messages.h b/remoting/protocol/jingle_messages.h
index 08e538a8a6a576653a2e0e4cd08fbfb300519f0c..4853226620699041ae46caecea6e2d90d4a23045 100644
--- a/remoting/protocol/jingle_messages.h
+++ b/remoting/protocol/jingle_messages.h
@@ -101,6 +101,10 @@ struct JingleMessage {
   // Content of session-info messages.
   std::unique_ptr<buzz::XmlElement> info;
 
+  // Content of plugin message. The node is read or written by all plugins, and
+  // ActionType independent.
+  std::unique_ptr<buzz::XmlElement> plugin_message;
+
   // Value from the <reason> tag if it is present in the
   // message. Useful mainly for session-terminate messages, but Jingle
   // spec allows it in any message.