[Chromoting] Add SessionPlugin in JingleSession

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 73c148f5040ef4f2bea561bc18dea4b2da8e5d1d..9ecd051329164df18bb9345f4e87c8558e691a78 100644
--- a/remoting/protocol/jingle_messages.h
+++ b/remoting/protocol/jingle_messages.h
@@ -90,6 +90,11 @@ struct JingleMessage {
   // message when parsing fails.
   bool ParseXml(const buzz::XmlElement* stanza, std::string* error);
 
+  // Attaches an XmlElement into |attachments|. If |attachment| is empty, this
+  // function returns immediately. Otherwise this function implicitly creates
+  // |attachments| if it's empty.
+  void AttachAttachment(std::unique_ptr<buzz::XmlElement> attachment);

[Sergey Ulanov, 2016/12/21 01:38:34]

AddAttachment()

[Hzj_jie, 2016/12/22 00:27:10]

Done.

+
   std::unique_ptr<buzz::XmlElement> ToXml() const;
 
   SignalingAddress from;