Cleanup: Use AUTH_SCHEME enum instead of a string.

net/http/http_auth_handler_digest.cc

 // 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.
 
 #include "net/http/http_auth_handler_digest.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/md5.h"
@@ skipping 248 matching lines @@
 //
 // Note that according to RFC 2617 (section 1.2) the realm is required.
 // However we allow it to be omitted, in which case it will default to the
 // empty string.
 //
 // This allowance is for better compatibility with webservers that fail to
 // send the realm (See http://crbug.com/20984 for an instance where a
 // webserver was not sending the realm with a BASIC challenge).
 bool HttpAuthHandlerDigest::ParseChallenge(
     HttpAuth::ChallengeTokenizer* challenge) {
-  auth_scheme_ = AUTH_SCHEME_DIGEST;
-  scheme_ = "digest";
+  auth_scheme_ = HttpAuth::AUTH_SCHEME_DIGEST;
   score_ = 2;
   properties_ = ENCRYPTS_IDENTITY;
 
   // Initialize to defaults.
   stale_ = false;
   algorithm_ = ALGORITHM_UNSPECIFIED;
   qop_ = QOP_UNSPECIFIED;
   realm_ = nonce_ = domain_ = opaque_ = std::string();
 
   // FAIL -- Couldn't match auth-scheme.
@@ skipping 86 matching lines @@
   //                 method and only constructing when valid.
   scoped_ptr<HttpAuthHandler> tmp_handler(
       new HttpAuthHandlerDigest(digest_nonce_count, nonce_generator_.get()));
   if (!tmp_handler->InitFromChallenge(challenge, target, origin, net_log))
     return ERR_INVALID_RESPONSE;
   handler->swap(tmp_handler);
   return OK;
 }
 
 }  // namespace net