[net/http auth] Use strings to identify authentication schemes.

net/http/http_log_util.cc

 // Copyright 2014 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_log_util.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "net/http/http_auth_challenge_tokenizer.h"
 #include "net/http/http_util.h"
 
 namespace net {
 
 namespace {
 
 bool ShouldRedactChallenge(HttpAuthChallengeTokenizer* challenge) {
   // Ignore lines with commas, as they may contain lists of schemes, and
   // the information we want to hide is Base64 encoded, so has no commas.
   if (challenge->challenge_text().find(',') != std::string::npos)
     return false;
 
-  std::string scheme = base::ToLowerASCII(challenge->scheme());
+  std::string scheme = challenge->NormalizedScheme();
   // Invalid input.
   if (scheme.empty())
     return false;
 
   // Ignore Basic and Digest authentication challenges, as they contain
   // public information.
   if (scheme == "basic" || scheme == "digest")
     return false;
 
   return true;
@@ skipping 34 matching lines @@
   if (redact_begin == redact_end)
     return value;
 
   return std::string(value.begin(), redact_begin) +
       base::StringPrintf("[%ld bytes were stripped]",
                          static_cast<long>(redact_end - redact_begin)) +
       std::string(redact_end, value.end());
 }
 
 }  // namespace net