Mojo: NULL -> nullptr in mojo/system and mojo/embedder.

mojo/system/message_pipe.cc

 // 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.
 
 #include "mojo/system/message_pipe.h"
 
 #include "base/logging.h"
 #include "mojo/system/channel_endpoint.h"
 #include "mojo/system/local_message_pipe_endpoint.h"
 #include "mojo/system/message_in_transit.h"
@@ skipping 166 matching lines @@
           channel_endpoint.get(),
           static_cast<LocalMessagePipeEndpoint*>(endpoints_[port].get()),
           is_peer_open));
   endpoints_[port].swap(replacement_endpoint);
 
   return channel_endpoint;
 }
 
 MojoResult MessagePipe::EnqueueMessage(unsigned port,
                                        scoped_ptr<MessageInTransit> message) {
-  return EnqueueMessageInternal(port, message.Pass(), NULL);
+  return EnqueueMessageInternal(port, message.Pass(), nullptr);
 }
 
 bool MessagePipe::Attach(unsigned port, ChannelEndpoint* channel_endpoint) {
   DCHECK(port == 0 || port == 1);
   DCHECK(channel_endpoint);
 
   base::AutoLock locker(lock_);
   if (!endpoints_[port])
     return false;
 
@@ skipping 116 matching lines @@
 MojoResult MessagePipe::HandleControlMessage(
     unsigned /*port*/,
     scoped_ptr<MessageInTransit> message) {
   LOG(WARNING) << "Unrecognized MessagePipe control message subtype "
                << message->subtype();
   return MOJO_RESULT_UNKNOWN;
 }
 
 }  // namespace system
 }  // namespace mojo