PairingAuthenticator implementation and plumbing.

remoting/protocol/me2me_host_authenticator_factory.h

Index: remoting/protocol/me2me_host_authenticator_factory.h
diff --git a/remoting/protocol/me2me_host_authenticator_factory.h b/remoting/protocol/me2me_host_authenticator_factory.h
index 7d0eebe83e836c00b9d5c2f48d3c7e5ed07fa3e0..cecb2b6f7f0110acce04d4fdf6024c096427cb56 100644
--- a/remoting/protocol/me2me_host_authenticator_factory.h
+++ b/remoting/protocol/me2me_host_authenticator_factory.h
@@ -21,19 +21,24 @@ class RsaKeyPair;
 
 namespace protocol {
 
+class PairingRegistry;
+
 class Me2MeHostAuthenticatorFactory : public AuthenticatorFactory {
  public:
   // Create a factory that dispenses shared secret authenticators.
   static scoped_ptr<AuthenticatorFactory> CreateWithSharedSecret(
       const std::string& local_cert,
       scoped_refptr<RsaKeyPair> key_pair,
-      const SharedSecretHash& shared_secret_hash);
+      const SharedSecretHash& shared_secret_hash,
+      scoped_refptr<PairingRegistry> pairing_registry);
+
   // Create a factory that dispenses third party authenticators.
   static scoped_ptr<AuthenticatorFactory> CreateWithThirdPartyAuth(
       const std::string& local_cert,
       scoped_refptr<RsaKeyPair> key_pair,
       scoped_ptr<ThirdPartyHostAuthenticator::TokenValidatorFactory>
           token_validator_factory);
+
   // Create a factory that dispenses rejecting authenticators (used when the
   // host config/policy is inconsistent)
   static scoped_ptr<AuthenticatorFactory> CreateRejecting();
@@ -59,6 +64,9 @@ class Me2MeHostAuthenticatorFactory : public AuthenticatorFactory {
   scoped_ptr<ThirdPartyHostAuthenticator::TokenValidatorFactory>
       token_validator_factory_;
 
+  // Used only for pairing host authenticators.
+  scoped_refptr<PairingRegistry> pairing_registry_;
+
   DISALLOW_COPY_AND_ASSIGN(Me2MeHostAuthenticatorFactory);
 };