Replace NULL with nullptr in all C++ files.

webrtc/modules/video_coding/frame_buffer.cc

 /*
  *  Copyright (c) 2012 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 71 matching lines @@
 bool VCMFrameBuffer::IsSessionComplete() const {
   return _sessionInfo.complete();
 }
 
 // Insert packet
 VCMFrameBufferEnum VCMFrameBuffer::InsertPacket(
     const VCMPacket& packet,
     int64_t timeInMs,
     VCMDecodeErrorMode decode_error_mode,
     const FrameData& frame_data) {
-  assert(!(NULL == packet.dataPtr && packet.sizeBytes > 0));
-  if (packet.dataPtr != NULL) {
+  assert(!(nullptr == packet.dataPtr && packet.sizeBytes > 0));
+  if (packet.dataPtr != nullptr) {
     _payloadType = packet.payloadType;
   }
 
   if (kStateEmpty == _state) {
     // First packet (empty and/or media) inserted into this frame.
     // store some info and set some initial values.
     _timeStamp = packet.timestamp;
     // We only take the ntp timestamp of the first packet of a frame.
     ntp_time_ms_ = packet.ntp_time_ms_;
     _codec = packet.codec;
@@ skipping 156 matching lines @@
   size_t bytes_removed = _sessionInfo.MakeDecodable();
   _length -= bytes_removed;
   // Transfer frame information to EncodedFrame and create any codec
   // specific information.
   _frameType = _sessionInfo.FrameType();
   _completeFrame = _sessionInfo.complete();
   _missingFrame = !continuous;
 }
 
 }  // namespace webrtc