Convert NULL to nullptr

util/mach/task_memory.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 102 matching lines @@
   //!
   //! This interface is an alternative to Read() that does not require the
   //! caller to provide a buffer to fill. This avoids copying memory, which can
   //! offer a performance improvement.
   //!
   //! \param[in] address The address, in the target task’s address space, of the
   //!     memory region to map.
   //! \param[in] size The size, in bytes, of the memory region to map.
   //!
   //! \return On success, a MappedMemory object that provides access to the data
-  //!     requested. On faliure, `NULL`, with a warning logged. Failures can
+  //!     requested. On faliure, `nullptr`, with a warning logged. Failures can
   //!     occur, for example, when encountering unmapped or unreadable pages.
   scoped_ptr<MappedMemory> ReadMapped(mach_vm_address_t address, size_t size);
 
   //! \brief Reads a `NUL`-terminated C string from the target task into a
   //!     string in the current task.
   //!
   //! The length of the string need not be known ahead of time. This method will
   //! read contiguous memory until a `NUL` terminator is found.
   //!
   //! \param[in] address The address, in the target task’s address space, of the
@@ skipping 34 matching lines @@
                            std::string* string);
 
   task_t task_;  // weak
 
   DISALLOW_COPY_AND_ASSIGN(TaskMemory);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_UTIL_MACH_TASK_MEMORY_H_