Mojo: NULL -> nullptr in mojo/public/cpp outside of bindings.

mojo/public/cpp/system/message_pipe.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 MOJO_PUBLIC_CPP_SYSTEM_MESSAGE_PIPE_H_
 #define MOJO_PUBLIC_CPP_SYSTEM_MESSAGE_PIPE_H_
 
 #include <assert.h>
 
 #include "mojo/public/c/system/message_pipe.h"
@@ skipping 67 matching lines @@
   MessagePipe();
   explicit MessagePipe(const MojoCreateMessagePipeOptions& options);
   ~MessagePipe();
 
   ScopedMessagePipeHandle handle0;
   ScopedMessagePipeHandle handle1;
 };
 
 inline MessagePipe::MessagePipe() {
   MojoResult result MOJO_ALLOW_UNUSED =
-      CreateMessagePipe(NULL, &handle0, &handle1);
+      CreateMessagePipe(nullptr, &handle0, &handle1);
   assert(result == MOJO_RESULT_OK);
 }
 
 inline MessagePipe::MessagePipe(const MojoCreateMessagePipeOptions& options) {
   MojoResult result MOJO_ALLOW_UNUSED =
       CreateMessagePipe(&options, &handle0, &handle1);
   assert(result == MOJO_RESULT_OK);
 }
 
 inline MessagePipe::~MessagePipe() {
 }
 
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_SYSTEM_MESSAGE_PIPE_H_