Make TokenValidatorFactory ref-counted.

remoting/host/token_validator_factory_impl.h

 // Copyright 2013 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.
 
 #ifndef REMOTING_HOST_TOKEN_VALIDATOR_FACTORY_IMPL_H_
 #define REMOTING_HOST_TOKEN_VALIDATOR_FACTORY_IMPL_H_
 
 #include <set>
 #include <string>
 
@@ skipping 10 matching lines @@
 class TokenValidatorFactoryImpl : public protocol::TokenValidatorFactory {
  public:
   // Creates a new factory. |token_url| and |token_validation_url| are the
   // third party authentication service URLs, obtained via policy. |key_pair_|
   // is used by the host to authenticate with the service by signing the token.
   TokenValidatorFactoryImpl(
       const ThirdPartyAuthConfig& third_party_auth_config,
       scoped_refptr<RsaKeyPair> key_pair,
       scoped_refptr<net::URLRequestContextGetter> request_context_getter);
 
-  ~TokenValidatorFactoryImpl() override;
-
   // TokenValidatorFactory interface.
   scoped_ptr<protocol::TokenValidator> CreateTokenValidator(
       const std::string& local_jid,
       const std::string& remote_jid) override;
 
  private:
+  ~TokenValidatorFactoryImpl() override;
+
   ThirdPartyAuthConfig third_party_auth_config_;
   scoped_refptr<RsaKeyPair> key_pair_;
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(TokenValidatorFactoryImpl);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_URL_FETCHER_TOKEN_VALIDATOR_FACTORY_H_