replace NULL->nullptr in src/remoting.

remoting/protocol/fake_datagram_socket.h

 // Copyright 2014 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_FAKE_DATAGRAM_SOCKET_H_
 #define REMOTING_PROTOCOL_FAKE_DATAGRAM_SOCKET_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 82 matching lines @@
 
   void set_fail_create(bool fail_create) { fail_create_ = fail_create; }
 
   // Pair with |peer_factory|. Once paired the factory will be automatically
   // pairing created sockets with the sockets with the same name from the peer
   // factory.
   void PairWith(FakeDatagramChannelFactory* peer_factory);
 
   // Can be used to retrieve FakeDatagramSocket created by this factory, e.g. to
   // feed data into it. The caller doesn't get ownership of the result. Returns
-  // NULL if the socket doesn't exist.
+  // nullptr if the socket doesn't exist.
   FakeDatagramSocket* GetFakeChannel(const std::string& name);
 
   // DatagramChannelFactory interface.
   void CreateChannel(const std::string& name,
                      const ChannelCreatedCallback& callback) override;
   void CancelChannelCreation(const std::string& name) override;
 
  private:
   typedef std::map<std::string, base::WeakPtr<FakeDatagramSocket> > ChannelsMap;
 
@@ skipping 11 matching lines @@
 
   base::WeakPtrFactory<FakeDatagramChannelFactory> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeDatagramChannelFactory);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_FAKE_DATAGRAM_SOCKET_H_