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

net/http/http_auth.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_AUTH_H_
 #define NET_HTTP_HTTP_AUTH_H_
 #pragma once
 
 #include <set>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
+#include "net/base/auth.h"
 #include "net/base/net_export.h"
 #include "net/http/http_util.h"
 
 template <class T> class scoped_refptr;
 
 namespace net {
 
 class BoundNetLog;
 class HttpAuthHandler;
 class HttpAuthHandlerFactory;
@@ skipping 73 matching lines @@
     AUTH_SCHEME_MAX,
   };
 
   // Helper structure used by HttpNetworkTransaction to track
   // the current identity being used for authorization.
   struct Identity {
     Identity();
 
     IdentitySource source;
     bool invalid;
-    string16 username;
-    string16 password;
+    AuthCredentials credentials;
   };
 
   // Get the name of the header containing the auth challenge
   // (either WWW-Authenticate or Proxy-Authenticate).
   static std::string GetChallengeHeaderName(Target target);
 
   // Get the name of the header where the credentials go
   // (either Authorization or Proxy-Authorization).
   static std::string GetAuthorizationHeaderName(Target target);
 
@@ skipping 97 matching lines @@
     std::string::const_iterator scheme_end_;
 
     std::string::const_iterator params_begin_;
     std::string::const_iterator params_end_;
   };
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_H_