Convert NULL to nullptr

util/mac/mac_util.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 14 matching lines @@
 //!     10.9.2.
 //!
 //! \note This is similar to the base::mac::IsOS*() family of functions, but
 //!     is provided for situations where the caller needs to obtain version
 //!     information beyond what is provided by Chromium’s base, or for when the
 //!     caller needs the actual minor version value.
 int MacOSXMinorVersion();
 
 //! \brief Returns the version of the running operating system.
 //!
-//! All parameters are required. No parameter may be `NULL`.
+//! All parameters are required. No parameter may be `nullptr`.
 //!
 //! \param[out] major The major version of the operating system, such as `10`
 //!     for Mac OS X 10.9.2.
 //! \param[out] minor The major version of the operating system, such as `9` for
 //!     Mac OS X 10.9.2.
 //! \param[out] bugfix The bugfix version of the operating system, such as `2`
 //!     for Mac OS X 10.9.2.
 //! \param[out] build The operating system’s build string, such as "13C64" for
 //!     Mac OS X 10.9.2.
 //! \param[out] server `true` for a Mac OS X Server installation, `false`
@@ skipping 18 matching lines @@
 //!     report “MacBookPro10,1”.
 //! \param[out] board_id The system’s board ID. A mid-2012 15" MacBook Pro would
 //!     report “Mac-C3EC7CD22292981F”.
 //!
 //! If a value cannot be determined, its string is cleared.
 void MacModelAndBoard(std::string* model, std::string* board_id);
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MAC_MAC_UTIL_H_