[net/http auth] Make HttpAuthHandler challenge handling asynchronous.

net/http/http_proxy_client_socket.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 NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
 #define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 79 matching lines @@
 
  private:
   enum State {
     STATE_NONE,
     STATE_GENERATE_AUTH_TOKEN,
     STATE_GENERATE_AUTH_TOKEN_COMPLETE,
     STATE_SEND_REQUEST,
     STATE_SEND_REQUEST_COMPLETE,
     STATE_READ_HEADERS,
     STATE_READ_HEADERS_COMPLETE,
+    STATE_HANDLE_PROXY_AUTH_CHALLENGE,
+    STATE_HANDLE_PROXY_AUTH_CHALLENGE_COMPLETE,
     STATE_DRAIN_BODY,
     STATE_DRAIN_BODY_COMPLETE,
     STATE_TCP_RESTART,
     STATE_TCP_RESTART_COMPLETE,
     STATE_DONE,
   };
 
   // The size in bytes of the buffer we use to drain the response body that
   // we want to throw away.  The response body is typically a small error
   // page just a few hundred bytes long.
   static const int kDrainBodyBufferSize = 1024;
 
   int PrepareForAuthRestart();
   int DidDrainBodyForAuthRestart(bool keep_alive);
 
   void LogBlockedTunnelResponse() const;
 
   void DoCallback(int result);
   void OnIOComplete(int result);
 
   int DoLoop(int last_io_result);
   int DoGenerateAuthToken();
   int DoGenerateAuthTokenComplete(int result);
   int DoSendRequest();
   int DoSendRequestComplete(int result);
   int DoReadHeaders();
   int DoReadHeadersComplete(int result);
+  int DoHandleProxyAuthChallenge();
+  int DoHandleProxyAuthChallengeComplete(int result);
   int DoDrainBody();
   int DoDrainBodyComplete(int result);
   int DoTCPRestart();
   int DoTCPRestartComplete(int result);
 
   CompletionCallback io_callback_;
   State next_state_;
 
   // Stores the callback to the layer above, called on completing Connect().
   CompletionCallback user_callback_;
@@ skipping 33 matching lines @@
   ProxyDelegate* proxy_delegate_;
 
   const BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_