C++11 declares a type safe null pointer

content/common/android/address_parser.cc

 // Copyright (c) 2012 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 "content/common/android/address_parser.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "content/common/android/address_parser_internal.h"
 
@@ skipping 107 matching lines @@
       DCHECK_GT(std::distance(current_word.begin, current_word.end), 0);
       size_t current_word_length = std::distance(
           current_word.begin, current_word.end);
       if (current_word_length > kMaxAddressNameWordLength) {
         continue_on_house_number = false;
         break;
       }
 
       // Check if the new word is a valid house number.
       if (house_number_parser.Parse(current_word.begin, current_word.end,
-          NULL)) {
+          nullptr)) {
         // Increase the number of consecutive house numbers since the beginning.
         if (consecutive_house_numbers) {
           // Check if there is a new line between consecutive house numbers.
           // This avoids false positives of the form "Cafe 21\n 750 Fifth Ave.."
           if (num_lines > 1) {
             next_house_number_word = next_word;
             break;
           }
         }
 
@@ skipping 72 matching lines @@
       it = words[next_word].end;
     }
   }
 
   return false;
 }
 
 }  // namespace address_parser
 
 }  // namespace content