[Draft] Fix canceling pin prompt causes host overload

remoting/protocol/connection_to_client.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
 #define REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
 class HostEventDispatcher;
 
 // This class represents a remote viewer connection to the chromoting
 // host. It sets up all protocol channels and connects them to the
 // stubs.
 class ConnectionToClient : public base::NonThreadSafe,
                            public Session::EventHandler {
  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;
 
     // Called when the network connection is authenticated and all
     // channels are connected.
     virtual void OnConnectionChannelsConnected(
         ConnectionToClient* connection) = 0;
 
     // Called when the network connection is closed or failed.
     virtual void OnConnectionClosed(ConnectionToClient* connection,
@@ skipping 43 matching lines @@
   // Set/get the stubs which will handle messages we receive from the client.
   // All stubs MUST be set before the session's channels become connected.
   virtual void set_clipboard_stub(ClipboardStub* clipboard_stub);
   virtual ClipboardStub* clipboard_stub();
   virtual void set_host_stub(HostStub* host_stub);
   virtual HostStub* host_stub();
   virtual void set_input_stub(InputStub* input_stub);
   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;
 
  private:
   // Callback for channel initialization.
   void OnChannelInitialized(bool successful);
 
   void NotifyIfChannelsReady();
 
@@ skipping 18 matching lines @@
   scoped_ptr<VideoWriter> video_writer_;
   scoped_ptr<AudioWriter> audio_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectionToClient);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_