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

net/spdy/spdy_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_SPDY_SPDY_PROXY_CLIENT_SOCKET_H_
 #define NET_SPDY_SPDY_PROXY_CLIENT_SOCKET_H_
 
 #include <list>
 #include <string>
 
@@ skipping 88 matching lines @@
   void OnClose(int status) override;
 
  private:
   enum State {
     STATE_DISCONNECTED,
     STATE_GENERATE_AUTH_TOKEN,
     STATE_GENERATE_AUTH_TOKEN_COMPLETE,
     STATE_SEND_REQUEST,
     STATE_SEND_REQUEST_COMPLETE,
     STATE_READ_REPLY_COMPLETE,
+    STATE_HANDLE_PROXY_AUTH_CHALLENGE,
+    STATE_HANDLE_PROXY_AUTH_CHALLENGE_COMPLETE,
     STATE_OPEN,
     STATE_CLOSED
   };
 
   void LogBlockedTunnelResponse() const;
 
   // Calls |callback.Run(result)|. Used to run a callback posted to the
   // message loop.
   void RunCallback(const CompletionCallback& callback, int result) const;
 
   void OnIOComplete(int result);
 
   int DoLoop(int last_io_result);
   int DoGenerateAuthToken();
   int DoGenerateAuthTokenComplete(int result);
   int DoSendRequest();
   int DoSendRequestComplete(int result);
   int DoReadReplyComplete(int result);
+  int DoHandleProxyAuthChallenge();
+  int DoHandleProxyAuthChallengeComplete(int result);
 
   // Populates |user_buffer_| with as much read data as possible
   // and returns the number of bytes read.
   size_t PopulateUserReadBuffer(char* out, size_t len);
 
   State next_state_;
 
   // Pointer to the SPDY Stream that this sits on top of.
   base::WeakPtr<SpdyStream> spdy_stream_;
 
@@ skipping 39 matching lines @@
   // Only used for posting write callbacks. Weak pointers created by this
   // factory are invalidated in Disconnect().
   base::WeakPtrFactory<SpdyProxyClientSocket> write_callback_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdyProxyClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_PROXY_CLIENT_SOCKET_H_