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

net/http/http_auth_handler_digest.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_HANDLER_DIGEST_H_
 #define NET_HTTP_HTTP_AUTH_HANDLER_DIGEST_H_
 #pragma once
 
 #include <string>
 
@@ skipping 66 matching lines @@
    private:
     scoped_ptr<const NonceGenerator> nonce_generator_;
   };
 
   virtual HttpAuth::AuthorizationResult HandleAnotherChallenge(
       HttpAuth::ChallengeTokenizer* challenge);
 
  protected:
   virtual bool Init(HttpAuth::ChallengeTokenizer* challenge);
 
-  virtual int GenerateAuthTokenImpl(const string16* username,
-                                    const string16* password,
+  virtual int GenerateAuthTokenImpl(const AuthCredentials* credentials,
                                     const HttpRequestInfo* request,
                                     OldCompletionCallback* callback,
                                     std::string* auth_token);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(HttpAuthHandlerDigestTest, ParseChallenge);
   FRIEND_TEST_ALL_PREFIXES(HttpAuthHandlerDigestTest, AssembleCredentials);
   FRIEND_TEST_ALL_PREFIXES(HttpNetworkTransactionTest, DigestPreAuthNonceCount);
 
   // Possible values for the "algorithm" property.
@@ skipping 42 matching lines @@
 
   // Extract the method and path of the request, as needed by
   // the 'A2' production. (path may be a hostname for proxy).
   void GetRequestMethodAndPath(const HttpRequestInfo* request,
                                std::string* method,
                                std::string* path) const;
 
   // Build up  the 'response' production.
   std::string AssembleResponseDigest(const std::string& method,
                                      const std::string& path,
-                                     const string16& username,
-                                     const string16& password,
+                                     const AuthCredentials& credentials,
                                      const std::string& cnonce,
                                      const std::string& nc) const;
 
   // Build up  the value for (Authorization/Proxy-Authorization).
   std::string AssembleCredentials(const std::string& method,
                                   const std::string& path,
-                                  const string16& username,
-                                  const string16& password,
+                                  const AuthCredentials& credentials,
                                   const std::string& cnonce,
                                   int nonce_count) const;
 
   // Information parsed from the challenge.
   std::string nonce_;
   std::string domain_;
   std::string opaque_;
   bool stale_;
   DigestAlgorithm algorithm_;
   QualityOfProtection qop_;
 
   // The realm as initially encoded over-the-wire. This is used in the
   // challenge text, rather than |realm_| which has been converted to
   // UTF-8.
   std::string original_realm_;
 
   int nonce_count_;
   const NonceGenerator* nonce_generator_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_HANDLER_DIGEST_H_