Invalidate credentials if the server rejects them.

net/http/http_auth.h

 // Copyright (c) 2010 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>
@@ skipping 34 matching lines @@
 
     AUTHORIZATION_RESULT_REJECT,   // The authorization attempt was rejected.
 
     AUTHORIZATION_RESULT_STALE,    // (Digest) The nonce used in the
                                    // authorization attempt is stale, but
                                    // otherwise the attempt was valid.
 
     AUTHORIZATION_RESULT_INVALID,  // The authentication challenge headers are
                                    // poorly formed (the authorization attempt
                                    // itself may have been fine).
+
+    AUTHORIZATION_RESULT_DIFFERENT_REALM,  // The authorization
+                                           // attempt was rejected,
+                                           // but the realm associated
+                                           // with the new challenge
+                                           // is different from the
+                                           // previous attempt.
   };
 
   // Describes where the identity used for authentication came from.
   enum IdentitySource {
     // Came from nowhere -- the identity is not initialized.
     IDENT_SRC_NONE,
 
     // The identity came from the auth cache, by doing a path-based
     // lookup (premptive authorization).
     IDENT_SRC_PATH_LOOKUP,
@@ skipping 143 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_