Enable V2 authentication for Me2Me host.

remoting/host/host_config.h

Index: remoting/host/host_config.h
diff --git a/remoting/host/host_config.h b/remoting/host/host_config.h
index bca937da662d6fe6e48a5fc2014c3ab85857c5e1..79b2060a4fb498e7e0867c61b026f66f59ccacec 100644
--- a/remoting/host/host_config.h
+++ b/remoting/host/host_config.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -26,6 +26,8 @@ extern const char kXmppAuthServiceConfigPath[];
 extern const char kHostIdConfigPath[];
 // Readable host name.
 extern const char kHostNameConfigPath[];
+// Hash of the host secret used for authentication.
+extern const char kHostSecretHashConfigPath[];
 // Private keys used for host authentication.
 extern const char kPrivateKeyConfigPath[];