Use AuthCredentials throughout the network stack instead of username/password.

net/http/http_network_transaction.h

 // Copyright (c) 2011 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_NETWORK_TRANSACTION_H_
 #define NET_HTTP_HTTP_NETWORK_TRANSACTION_H_
 #pragma once
 
 #include <string>
 
@@ skipping 29 matching lines @@
 
   virtual ~HttpNetworkTransaction();
 
   // HttpTransaction methods:
   virtual int Start(const HttpRequestInfo* request_info,
                     OldCompletionCallback* callback,
                     const BoundNetLog& net_log);
   virtual int RestartIgnoringLastError(OldCompletionCallback* callback);
   virtual int RestartWithCertificate(X509Certificate* client_cert,
                                      OldCompletionCallback* callback);
-  virtual int RestartWithAuth(const string16& username,
-                              const string16& password,
-                              OldCompletionCallback* callback);
+  virtual int RestartWithAuth(const AuthCredentials& credentials,
+                              OldCompletionCallback* callback) OVERRIDE;
   virtual bool IsReadyToRestartForAuth();
 
   virtual int Read(IOBuffer* buf, int buf_len, OldCompletionCallback* callback);
   virtual void StopCaching() {}
   virtual void DoneReading() {}
   virtual const HttpResponseInfo* GetResponseInfo() const;
   virtual LoadState GetLoadState() const;
   virtual uint64 GetUploadProgress() const;
 
   // HttpStreamRequest::Delegate methods:
@@ skipping 208 matching lines @@
   // True when the tunnel is in the process of being established - we can't
   // read from the socket until the tunnel is done.
   bool establishing_tunnel_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkTransaction);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_TRANSACTION_H_