Parse termination reason and propagate the error to the Session interface.

remoting/protocol/jingle_session.h

Index: remoting/protocol/jingle_session.h
diff --git a/remoting/protocol/jingle_session.h b/remoting/protocol/jingle_session.h
index 505944fc925321215e8a924686adf5189eb84979..cd467a1dff24beb9b300f8425fc7ef5eba0c9f7b 100644
--- a/remoting/protocol/jingle_session.h
+++ b/remoting/protocol/jingle_session.h
@@ -28,6 +28,7 @@ class JingleSession : public protocol::Session,
  public:
   // Session interface.
   virtual void SetStateChangeCallback(StateChangeCallback* callback) OVERRIDE;
+  virtual Error error() OVERRIDE;
   virtual void CreateStreamChannel(
       const std::string& name,
       const StreamChannelCallback& callback) OVERRIDE;
@@ -150,6 +151,8 @@ class JingleSession : public protocol::Session,
   State state_;
   scoped_ptr<StateChangeCallback> state_change_callback_;
 
+  Error error_;
+
   bool closing_;
 
   // JID of the other side. Set when the connection is initialized,