Replace NULL with nullptr in all C++ files.

webrtc/modules/video_coding/test/vcm_payload_sink_factory.cc

 /*
  *  Copyright (c) 2013 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 109 matching lines @@
   assert(sinks_.empty());
 }
 
 PayloadSinkInterface* VcmPayloadSinkFactory::Create(
     RtpStreamInterface* stream) {
   assert(stream);
   CriticalSectionScoped cs(crit_sect_.get());
 
   std::unique_ptr<VideoCodingModule> vcm(
       VideoCodingModule::Create(clock_, null_event_factory_.get()));
-  if (vcm.get() == NULL) {
-    return NULL;
+  if (vcm.get() == nullptr) {
+    return nullptr;
   }
 
   const PayloadTypes& plt = stream->payload_types();
   for (PayloadTypesIterator it = plt.begin(); it != plt.end(); ++it) {
     if (it->codec_type() != kVideoCodecULPFEC &&
         it->codec_type() != kVideoCodecRED) {
       VideoCodec codec;
       VideoCodingModule::Codec(it->codec_type(), &codec);
       codec.plType = it->payload_type();
       if (vcm->RegisterReceiveCodec(&codec, 1) < 0) {
-        return NULL;
+        return nullptr;
       }
     }
   }
 
   vcm->SetChannelParameters(0, 0, rtt_ms_);
   vcm->SetVideoProtection(protection_method_, protection_enabled_);
   vcm->SetRenderDelay(render_delay_ms_);
   vcm->SetMinimumPlayoutDelay(min_playout_delay_ms_);
   vcm->SetNackSettings(kMaxNackListSize, kMaxPacketAgeToNack, 0);
 
@@ skipping 41 matching lines @@
 void VcmPayloadSinkFactory::Remove(VcmPayloadSink* sink) {
   assert(sink);
   CriticalSectionScoped cs(crit_sect_.get());
   Sinks::iterator it = std::find(sinks_.begin(), sinks_.end(), sink);
   assert(it != sinks_.end());
   sinks_.erase(it);
 }
 
 }  // namespace rtpplayer
 }  // namespace webrtc