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

mojo/system/channel_endpoint.cc

 // 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.
 
 #include "mojo/system/channel_endpoint.h"
 
 #include "base/logging.h"
 #include "mojo/system/channel.h"
 #include "mojo/system/message_pipe.h"
 
@@ skipping 67 matching lines @@
   DCHECK_EQ(remote_id_, MessageInTransit::kInvalidEndpointId);
   remote_id_ = remote_id;
 }
 
 void ChannelEndpoint::DetachFromChannel() {
   base::AutoLock locker(lock_);
   DCHECK(channel_);
   DCHECK_NE(local_id_, MessageInTransit::kInvalidEndpointId);
   // TODO(vtl): Once we combine "run" into "attach", |remote_id_| should valid
   // here as well.
-  channel_ = NULL;
+  channel_ = nullptr;
   local_id_ = MessageInTransit::kInvalidEndpointId;
   remote_id_ = MessageInTransit::kInvalidEndpointId;
 }
 
 ChannelEndpoint::~ChannelEndpoint() {
   DCHECK(!channel_);
   DCHECK_EQ(local_id_, MessageInTransit::kInvalidEndpointId);
   DCHECK_EQ(remote_id_, MessageInTransit::kInvalidEndpointId);
 }
 
 bool ChannelEndpoint::WriteMessageNoLock(scoped_ptr<MessageInTransit> message) {
   DCHECK(message);
 
   lock_.AssertAcquired();
 
   DCHECK(channel_);
   DCHECK_NE(local_id_, MessageInTransit::kInvalidEndpointId);
   DCHECK_NE(remote_id_, MessageInTransit::kInvalidEndpointId);
 
   message->SerializeAndCloseDispatchers(channel_);
   message->set_source_id(local_id_);
   message->set_destination_id(remote_id_);
   return channel_->WriteMessage(message.Pass());
 }
 
 }  // namespace system
 }  // namespace mojo