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

net/http/http_auth_handler_ntlm.cc

Index: net/http/http_auth_handler_ntlm.cc
diff --git a/net/http/http_auth_handler_ntlm.cc b/net/http/http_auth_handler_ntlm.cc
index c866598707f173ecd0e2f687ee8bc86f7c22a11a..7d1367e5f2d7bfc138d9b812328dfe15308094dc 100644
--- a/net/http/http_auth_handler_ntlm.cc
+++ b/net/http/http_auth_handler_ntlm.cc
@@ -21,12 +21,22 @@ HttpAuth::AuthorizationResult HttpAuthHandlerNTLM::HandleAnotherChallenge(
   return ParseChallenge(challenge, false);
 }
 
-int HttpAuthHandlerNTLM::Init(const HttpAuthChallengeTokenizer& tok) {
-  return ParseChallenge(tok, true) == HttpAuth::AUTHORIZATION_RESULT_ACCEPT
+int HttpAuthHandlerNTLM::InitializeFromChallengeInternal(
+    const HttpAuthChallengeTokenizer& challenge,
+    const HttpResponseInfo& response_with_challenge,
+    const CompletionCallback& callback) {
+  return ParseChallenge(challenge, true) ==
+                 HttpAuth::AUTHORIZATION_RESULT_ACCEPT
              ? OK
              : ERR_INVALID_RESPONSE;
 }
 
+int HttpAuthHandlerNTLM::InitializeFromCacheEntryInternal(
+    HttpAuthCache::Entry*) {
+  NOTREACHED();
+  return ERR_UNSUPPORTED_AUTH_SCHEME;
+}
+
 int HttpAuthHandlerNTLM::GenerateAuthTokenImpl(
     const AuthCredentials* credentials,
     const HttpRequestInfo& request,
@@ -145,7 +155,6 @@ std::string HttpAuthHandlerNTLM::CreateSPN(const GURL& origin) {
 scoped_ptr<HttpAuthHandler>
 HttpAuthHandlerNTLM::Factory::CreateAndInitPreemptiveAuthHandler(
     HttpAuthCache::Entry* cache_entry,
-    const HttpAuthChallengeTokenizer& tokenizer,
     HttpAuth::Target target,
     const BoundNetLog& net_log) {
   return scoped_ptr<HttpAuthHandler>();