Replace NULL with nullptr in all C++ files.

webrtc/p2p/base/stunserver_unittest.cc

 /*
  *  Copyright 2004 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 33 matching lines @@
     msg.Write(&buf);
     Send(buf.Data(), static_cast<int>(buf.Length()));
   }
   void Send(const char* buf, int len) {
     client_->SendTo(buf, len, server_addr);
   }
   bool ReceiveFails() {
     return(client_->CheckNoPacket());
   }
   StunMessage* Receive() {
-    StunMessage* msg = NULL;
+    StunMessage* msg = nullptr;
     rtc::TestClient::Packet* packet =
         client_->NextPacket(rtc::TestClient::kTimeoutMs);
     if (packet) {
       rtc::ByteBufferReader buf(packet->buf, packet->size);
       msg = new StunMessage();
       msg->Read(&buf);
       delete packet;
     }
     return msg;
   }
@@ skipping 10 matching lines @@
 #if !defined(THREAD_SANITIZER)
 
 TEST_F(StunServerTest, TestGood) {
   StunMessage req;
   std::string transaction_id = "0123456789ab";
   req.SetType(STUN_BINDING_REQUEST);
   req.SetTransactionID(transaction_id);
   Send(req);
 
   StunMessage* msg = Receive();
-  ASSERT_TRUE(msg != NULL);
+  ASSERT_TRUE(msg != nullptr);
   EXPECT_EQ(STUN_BINDING_RESPONSE, msg->type());
   EXPECT_EQ(req.transaction_id(), msg->transaction_id());
 
   const StunAddressAttribute* mapped_addr =
       msg->GetAddress(STUN_ATTR_MAPPED_ADDRESS);
-  EXPECT_TRUE(mapped_addr != NULL);
+  EXPECT_TRUE(mapped_addr != nullptr);
   EXPECT_EQ(1, mapped_addr->family());
   EXPECT_EQ(client_addr.port(), mapped_addr->port());
   if (mapped_addr->ipaddr() != client_addr.ipaddr()) {
     LOG(LS_WARNING) << "Warning: mapped IP ("
                     << mapped_addr->ipaddr()
                     << ") != local IP (" << client_addr.ipaddr()
                     << ")";
   }
 
   delete msg;
 }
 
 #endif // if !defined(THREAD_SANITIZER)
 
 TEST_F(StunServerTest, TestBad) {
   const char* bad = "this is a completely nonsensical message whose only "
                     "purpose is to make the parser go 'ack'.  it doesn't "
                     "look anything like a normal stun message";
   Send(bad, static_cast<int>(strlen(bad)));
 
   ASSERT_TRUE(ReceiveFails());
 }