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

net/http/http_auth_handler_negotiate.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_NEGOTIATE_H_
 #define NET_HTTP_HTTP_AUTH_HANDLER_NEGOTIATE_H_
 
 #include <string>
 
 #include "build/build_config.h"
@@ skipping 63 matching lines @@
     // |auth_library|.
     void set_library(AuthLibrary* auth_provider) {
       auth_library_.reset(auth_provider);
     }
 
     // HttpAuthHandlerFactory
     scoped_ptr<HttpAuthHandler> CreateAuthHandlerForScheme(
         const std::string& scheme) override;
     scoped_ptr<HttpAuthHandler> CreateAndInitPreemptiveAuthHandler(
         HttpAuthCache::Entry* cache_entry,
-        const HttpAuthChallengeTokenizer& tokenizer,
         HttpAuth::Target target,
         const BoundNetLog& net_log) override;
 
    private:
     bool disable_cname_lookup_;
     bool use_port_;
     HostResolver* resolver_;
 #if defined(OS_WIN)
     ULONG max_token_length_;
 #endif
@@ skipping 17 matching lines @@
   const std::string& spn() const { return spn_; }
 
   // HttpAuthHandler:
   HttpAuth::AuthorizationResult HandleAnotherChallenge(
       const HttpAuthChallengeTokenizer& challenge) override;
   bool NeedsIdentity() override;
   bool AllowsDefaultCredentials() override;
   bool AllowsExplicitCredentials() override;
 
  protected:
-  int Init(const HttpAuthChallengeTokenizer& challenge) override;
-
+  // HttpAuthHandler
+  int InitializeFromChallengeInternal(
+      const HttpAuthChallengeTokenizer& challenge,
+      const HttpResponseInfo& response_with_challenge,
+      const CompletionCallback& callback) override;
+  int InitializeFromCacheEntryInternal(
+      HttpAuthCache::Entry* cache_entry) override;
   int GenerateAuthTokenImpl(const AuthCredentials* credentials,
                             const HttpRequestInfo& request,
                             const CompletionCallback& callback,
                             std::string* auth_token) override;
 
  private:
   enum State {
     STATE_RESOLVE_CANONICAL_NAME,
     STATE_RESOLVE_CANONICAL_NAME_COMPLETE,
     STATE_GENERATE_AUTH_TOKEN,
@@ skipping 31 matching lines @@
   std::string* auth_token_;
 
   State next_state_;
 
   const URLSecurityManager* url_security_manager_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_HANDLER_NEGOTIATE_H_