[net/http auth] Cleanup. Method names, and constness.

net/http/http_auth_gssapi_posix.cc

Index: net/http/http_auth_gssapi_posix.cc
diff --git a/net/http/http_auth_gssapi_posix.cc b/net/http/http_auth_gssapi_posix.cc
index be6978f365434159081b7c65627b381cac2f56fb..cac0e952d2558c40e07e32243b494391158b35f7 100644
--- a/net/http/http_auth_gssapi_posix.cc
+++ b/net/http/http_auth_gssapi_posix.cc
@@ -687,13 +687,13 @@ void HttpAuthGSSAPI::Delegate() {
 }
 
 HttpAuth::AuthorizationResult HttpAuthGSSAPI::ParseChallenge(
-    HttpAuthChallengeTokenizer* tok) {
+    const HttpAuthChallengeTokenizer& tok) {
   if (scoped_sec_context_.get() == GSS_C_NO_CONTEXT) {
-    return net::ParseFirstRoundChallenge(scheme_, tok);
+    return ParseFirstRoundChallenge(scheme_, tok);
   }
   std::string encoded_auth_token;
-  return net::ParseLaterRoundChallenge(scheme_, tok, &encoded_auth_token,
-                                       &decoded_server_auth_token_);
+  return ParseLaterRoundChallenge(scheme_, tok, &encoded_auth_token,
+                                  &decoded_server_auth_token_);
 }
 
 int HttpAuthGSSAPI::GenerateAuthToken(const AuthCredentials* credentials,