[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/connection_to_client.h

Index: remoting/protocol/connection_to_client.h
diff --git a/remoting/protocol/connection_to_client.h b/remoting/protocol/connection_to_client.h
index 986530708497f5b52ca685be606ea5bd270fe7a8..c0fd2931b4779865f1e43c2382a501929463f701 100644
--- a/remoting/protocol/connection_to_client.h
+++ b/remoting/protocol/connection_to_client.h
@@ -38,6 +38,9 @@ class ConnectionToClient : public base::NonThreadSafe,
  public:
   class EventHandler {
    public:
+    // Called when the network connection is Authenticating
+    virtual void OnConnectionAuthenticating(ConnectionToClient* connection) = 0;
+
     // Called when the network connection is authenticated.
     virtual void OnConnectionAuthenticated(ConnectionToClient* connection) = 0;
 
@@ -101,6 +104,7 @@ class ConnectionToClient : public base::NonThreadSafe,
   virtual InputStub* input_stub();
 
   // Session::EventHandler interface.
+  virtual void OnSessionAuthenticationBegin() OVERRIDE;
   virtual void OnSessionStateChange(Session::State state) OVERRIDE;
   virtual void OnSessionRouteChange(const std::string& channel_name,
                                     const TransportRoute& route) OVERRIDE;