Add policy to restrict client domain for Me2Me.

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 c3140b39c4e3c023848fb9ddcd9b33f363a1e33a..5cc1beed5e75dc49b53ca6492d2079d849c77b88 100644
--- a/remoting/protocol/me2me_host_authenticator_factory.h
+++ b/remoting/protocol/me2me_host_authenticator_factory.h
@@ -32,6 +32,7 @@ class Me2MeHostAuthenticatorFactory : public AuthenticatorFactory {
       const std::string& host_owner,
       const std::string& local_cert,
       scoped_refptr<RsaKeyPair> key_pair,
+      const std::string& required_client_domain,
       const SharedSecretHash& shared_secret_hash,
       scoped_refptr<PairingRegistry> pairing_registry);
 
@@ -41,6 +42,7 @@ class Me2MeHostAuthenticatorFactory : public AuthenticatorFactory {
       const std::string& host_owner,
       const std::string& local_cert,
       scoped_refptr<RsaKeyPair> key_pair,
+      const std::string& required_client_domain,
       scoped_ptr<TokenValidatorFactory> token_validator_factory);
 
   Me2MeHostAuthenticatorFactory();
@@ -58,6 +60,7 @@ class Me2MeHostAuthenticatorFactory : public AuthenticatorFactory {
   std::string host_owner_;
   std::string local_cert_;
   scoped_refptr<RsaKeyPair> key_pair_;
+  std::string required_client_domain_;
 
   // Used only for shared secret host authenticators.
   SharedSecretHash shared_secret_hash_;