Replace NULL with nullptr in all C++ files.

webrtc/examples/peerconnection/server/data_socket.cc

 /*
  *  Copyright 2011 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 177 matching lines @@
   struct {
     const char* method_name;
     size_t method_name_len;
     RequestMethod id;
   } supported_methods[] = {
     { "GET", 3, GET },
     { "POST", 4, POST },
     { "OPTIONS", 7, OPTIONS },
   };
 
-  const char* path = NULL;
+  const char* path = nullptr;
   for (size_t i = 0; i < ARRAYSIZE(supported_methods); ++i) {
     if (len > supported_methods[i].method_name_len &&
         isspace(begin[supported_methods[i].method_name_len]) &&
         strncmp(begin, supported_methods[i].method_name,
                 supported_methods[i].method_name_len) == 0) {
       method_ = supported_methods[i].id;
       path = begin + supported_methods[i].method_name_len;
       break;
     }
   }
@@ skipping 28 matching lines @@
         while (headers[0] == ' ')
           ++headers;
         content_length_ = atoi(headers);
       } else if ((headers + ARRAYSIZE(kContentType)) < end &&
                  strncmp(headers, kContentType,
                          ARRAYSIZE(kContentType) - 1) == 0) {
         headers += ARRAYSIZE(kContentType) - 1;
         while (headers[0] == ' ')
           ++headers;
         const char* type_end = strstr(headers, "\r\n");
-        if (type_end == NULL)
+        if (type_end == nullptr)
           type_end = end;
         content_type_.assign(headers, type_end);
       }
     } else {
       ++headers;
     }
     headers = strstr(headers, "\r\n");
     if (headers)
       headers += 2;
   }
@@ skipping 22 matching lines @@
   return listen(socket_, 5) != SOCKET_ERROR;
 }
 
 DataSocket* ListeningSocket::Accept() const {
   assert(valid());
   struct sockaddr_in addr = {0};
   socklen_t size = sizeof(addr);
   NativeSocket client =
       accept(socket_, reinterpret_cast<sockaddr*>(&addr), &size);
   if (client == INVALID_SOCKET)
-    return NULL;
+    return nullptr;
 
   return new DataSocket(client);
 }