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

remoting/protocol/pepper_session.h

Index: remoting/protocol/pepper_session.h
diff --git a/remoting/protocol/pepper_session.h b/remoting/protocol/pepper_session.h
index 93bb6ef5771ff1429b3fa1e08db96e8a3c3b7638..ab0a26d94458eb5282e7568344491eca50b3bfb2 100644
--- a/remoting/protocol/pepper_session.h
+++ b/remoting/protocol/pepper_session.h
@@ -43,22 +43,11 @@ class SocketWrapper;
 // outgoing connections.
 class PepperSession : public Session {
  public:
-  // TODO(sergeyu): Move this type and error() method to the Session
-  // interface.
-  enum Error {
-    ERROR_NO_ERROR = 0,
-    ERROR_PEER_IS_OFFLINE,
-    ERROR_SESSION_REJECTED,
-    ERROR_INCOMPATIBLE_PROTOCOL,
-    ERROR_CHANNEL_CONNECTION_FAILURE,
-  };
-
   virtual ~PepperSession();
 
-  Error error();
-
   // Session interface.
   virtual void SetStateChangeCallback(StateChangeCallback* callback) OVERRIDE;
+  virtual Error error() OVERRIDE;
   virtual void CreateStreamChannel(
       const std::string& name,
       const StreamChannelCallback& callback) OVERRIDE;