Private API for extensions like ssh-client that need access to TCP.

base/hmac_mac.cc

Index: base/hmac_mac.cc
diff --git a/base/hmac_mac.cc b/base/hmac_mac.cc
index 97dcbf594184a67c7bfb4890b0977859e9a9b9fe..696ad5f1082d3e98caeda6a26ad5340542e410ac 100644
--- a/base/hmac_mac.cc
+++ b/base/hmac_mac.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -41,7 +41,7 @@ HMAC::~HMAC() {
 
 bool HMAC::Sign(const std::string& data,
                 unsigned char* digest,
-                int digest_length) {
+                int digest_length) const {
   CCHmacAlgorithm algorithm;
   int algorithm_digest_length;
   switch (hash_alg_) {