Replace NULL with nullptr in all C++ files.

webrtc/modules/remote_bitrate_estimator/inter_arrival.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 19 matching lines @@
       burst_grouping_(enable_burst_grouping),
       num_consecutive_reordered_packets_(0) {}
 
 bool InterArrival::ComputeDeltas(uint32_t timestamp,
                                  int64_t arrival_time_ms,
                                  int64_t system_time_ms,
                                  size_t packet_size,
                                  uint32_t* timestamp_delta,
                                  int64_t* arrival_time_delta_ms,
                                  int* packet_size_delta) {
-  assert(timestamp_delta != NULL);
-  assert(arrival_time_delta_ms != NULL);
-  assert(packet_size_delta != NULL);
+  assert(timestamp_delta != nullptr);
+  assert(arrival_time_delta_ms != nullptr);
+  assert(packet_size_delta != nullptr);
   bool calculated_deltas = false;
   if (current_timestamp_group_.IsFirstPacket()) {
     // We don't have enough data to update the filter, so we store it until we
     // have two frames of data to process.
     current_timestamp_group_.timestamp = timestamp;
     current_timestamp_group_.first_timestamp = timestamp;
   } else if (!PacketInOrder(timestamp)) {
     return false;
   } else if (NewTimestampGroup(arrival_time_ms, timestamp)) {
     // First packet of a later frame, the previous frame sample is ready.
@@ skipping 95 matching lines @@
   return propagation_delta_ms < 0 &&
       arrival_time_delta_ms <= kBurstDeltaThresholdMs;
 }
 
 void InterArrival::Reset() {
   num_consecutive_reordered_packets_ = 0;
   current_timestamp_group_ = TimestampGroup();
   prev_timestamp_group_ = TimestampGroup();
 }
 }  // namespace webrtc