Enable Curve25519 in host and client for PIN-based and third-party auth.

remoting/protocol/spake2_authenticator.cc

Index: remoting/protocol/spake2_authenticator.cc
diff --git a/remoting/protocol/spake2_authenticator.cc b/remoting/protocol/spake2_authenticator.cc
index d7c0a6c5550b945cf71a539da116b805862bd12d..ab03e5d8fadf3044f839fcb3b15cf8318b429d41 100644
--- a/remoting/protocol/spake2_authenticator.cc
+++ b/remoting/protocol/spake2_authenticator.cc
@@ -93,9 +93,9 @@ scoped_ptr<Authenticator> Spake2Authenticator::CreateForClient(
 scoped_ptr<Authenticator> Spake2Authenticator::CreateForHost(
     const std::string& local_id,
     const std::string& remote_id,
-    const std::string& shared_secret,
     const std::string& local_cert,
     scoped_refptr<RsaKeyPair> key_pair,
+    const std::string& shared_secret,
     Authenticator::State initial_state) {
   scoped_ptr<Spake2Authenticator> result(new Spake2Authenticator(
       local_id, remote_id, shared_secret, true, initial_state));