C++11 declares a type safe null pointer

content/common/child_process_sandbox_support_impl_linux.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/child_process_sandbox_support_impl_linux.h"
 
 #include <sys/stat.h>
 
 #include <limits>
 
@@ skipping 17 matching lines @@
                                  blink::WebFallbackFont* fallbackFont) {
   TRACE_EVENT0("sandbox_ipc", "GetFontFamilyForCharacter");
 
   Pickle request;
   request.WriteInt(LinuxSandbox::METHOD_GET_FALLBACK_FONT_FOR_CHAR);
   request.WriteInt(character);
   request.WriteString(preferred_locale);
 
   uint8_t buf[512];
   const ssize_t n = UnixDomainSocket::SendRecvMsg(GetSandboxFD(), buf,
-                                                  sizeof(buf), NULL, request);
+                                                  sizeof(buf),
+                                                  nullptr, request);
 
   std::string family_name;
   std::string filename;
   int fontconfigInterfaceId = 0;
   int ttcIndex = 0;
   bool isBold = false;
   bool isItalic = false;
   if (n != -1) {
     Pickle reply(reinterpret_cast<char*>(buf), n);
     PickleIterator pickle_iter(reply);
@@ skipping 31 matching lines @@
 
   Pickle request;
   request.WriteInt(LinuxSandbox::METHOD_GET_STYLE_FOR_STRIKE);
   request.WriteString(family);
   request.WriteBool(bold);
   request.WriteBool(italic);
   request.WriteUInt16(pixel_size);
 
   uint8_t buf[512];
   const ssize_t n = UnixDomainSocket::SendRecvMsg(GetSandboxFD(), buf,
-                                                  sizeof(buf), NULL, request);
+                                                  sizeof(buf),
+                                                  nullptr, request);
   if (n == -1)
     return;
 
   Pickle reply(reinterpret_cast<char*>(buf), n);
   PickleIterator pickle_iter(reply);
   int use_bitmaps, use_autohint, use_hinting, hint_style, use_antialias;
   int use_subpixel_rendering, use_subpixel_positioning;
   if (reply.ReadInt(&pickle_iter, &use_bitmaps) &&
       reply.ReadInt(&pickle_iter, &use_autohint) &&
       reply.ReadInt(&pickle_iter, &use_hinting) &&
@@ skipping 105 matching lines @@
 }
 
 bool SendZygoteChildPing(int fd) {
   return UnixDomainSocket::SendMsg(fd,
                                    kZygoteChildPingMessage,
                                    sizeof(kZygoteChildPingMessage),
                                    std::vector<int>());
 }
 
 }  // namespace content