replace NULL->nullptr in src/remoting.

remoting/protocol/negotiating_host_authenticator.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_PROTOCOL_NEGOTIATING_HOST_AUTHENTICATOR_H_
 #define REMOTING_PROTOCOL_NEGOTIATING_HOST_AUTHENTICATOR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 12 matching lines @@
 
 namespace protocol {
 
 // Host-side implementation of NegotiatingAuthenticatorBase.
 // See comments in negotiating_authenticator_base.h for a general explanation.
 class NegotiatingHostAuthenticator : public NegotiatingAuthenticatorBase {
  public:
   ~NegotiatingHostAuthenticator() override;
 
   // Creates a host authenticator, using a fixed shared secret/PIN hash.
-  // If |pairing_registry| is non-NULL then the Spake2Pair method will
+  // If |pairing_registry| is non-nullptr then the Spake2Pair method will
   // be offered, supporting PIN-less authentication.
   static scoped_ptr<Authenticator> CreateWithSharedSecret(
       const std::string& local_cert,
       scoped_refptr<RsaKeyPair> key_pair,
       const std::string& shared_secret_hash,
       AuthenticationMethod::HashFunction hash_function,
       scoped_refptr<PairingRegistry> pairing_registry);
 
   // Creates a host authenticator, using third party authentication.
   static scoped_ptr<Authenticator> CreateWithThirdPartyAuth(
@@ skipping 30 matching lines @@
   // Used only for pairing authenticators.
   scoped_refptr<PairingRegistry> pairing_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(NegotiatingHostAuthenticator);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_NEGOTIATING_HOST_AUTHENTICATOR_H_