Replace NULL with nullptr in all C++ files.

webrtc/modules/video_coding/test/rtp_player.cc

Index: webrtc/modules/video_coding/test/rtp_player.cc
diff --git a/webrtc/modules/video_coding/test/rtp_player.cc b/webrtc/modules/video_coding/test/rtp_player.cc
index 42cc61f782dc074b1ffd6f0c218cfda140f911eb..a6d8e0e2fba4b716332049ecd136cc25b6e73b9d 100644
--- a/webrtc/modules/video_coding/test/rtp_player.cc
+++ b/webrtc/modules/video_coding/test/rtp_player.cc
@@ -88,7 +88,7 @@ class LostPackets {
   ~LostPackets() {
     if (debug_file_) {
       fclose(debug_file_);
-      debug_file_ = NULL;
+      debug_file_ = nullptr;
     }
     while (!packets_.empty()) {
       delete packets_.back();
@@ -137,7 +137,7 @@ class LostPackets {
         return packet;
       }
     }
-    return NULL;
+    return nullptr;
   }
 
   int NumberOfPacketsToResend() const {
@@ -215,7 +215,7 @@ class SsrcHandlers {
     std::unique_ptr<Handler> handler(
         new Handler(ssrc, payload_types_, lost_packets));
     handler->payload_sink_.reset(payload_sink_factory_->Create(handler.get()));
-    if (handler->payload_sink_.get() == NULL) {
+    if (handler->payload_sink_.get() == nullptr) {
       return -1;
     }
 
@@ -223,9 +223,9 @@ class SsrcHandlers {
     configuration.clock = clock;
     configuration.audio = false;
     handler->rtp_module_.reset(RtpReceiver::CreateVideoReceiver(
-        configuration.clock, handler->payload_sink_.get(), NULL,
+        configuration.clock, handler->payload_sink_.get(), nullptr,
         handler->rtp_payload_registry_.get()));
-    if (handler->rtp_module_.get() == NULL) {
+    if (handler->rtp_module_.get() == nullptr) {
       return -1;
     }
 
@@ -349,7 +349,8 @@ class RtpPlayerImpl : public RtpPlayerInterface {
   virtual int NextPacket(int64_t time_now) {
     // Send any packets ready to be resent.
     for (RawRtpPacket* packet = lost_packets_.NextPacketToResend(time_now);
-         packet != NULL; packet = lost_packets_.NextPacketToResend(time_now)) {
+         packet != nullptr;
+         packet = lost_packets_.NextPacketToResend(time_now)) {
       int ret = SendPacket(packet->data(), packet->length());
       if (ret > 0) {
         printf("Resend: %08x:%u\n", packet->ssrc(), packet->seq_num());
@@ -372,7 +373,7 @@ class RtpPlayerImpl : public RtpPlayerInterface {
         first_packet_ = false;
       }
 
-      if (reordering_ && reorder_buffer_.get() == NULL) {
+      if (reordering_ && reorder_buffer_.get() == nullptr) {
         reorder_buffer_.reset(
             new RawRtpPacket(next_packet_.data, next_packet_.length, 0, 0));
         return 0;
@@ -380,7 +381,7 @@ class RtpPlayerImpl : public RtpPlayerInterface {
       int ret = SendPacket(next_packet_.data, next_packet_.length);
       if (reorder_buffer_.get()) {
         SendPacket(reorder_buffer_->data(), reorder_buffer_->length());
-        reorder_buffer_.reset(NULL);
+        reorder_buffer_.reset(nullptr);
       }
       if (ret < 0) {
         return ret;
@@ -476,11 +477,11 @@ RtpPlayerInterface* Create(const std::string& input_filename,
   std::unique_ptr<test::RtpFileReader> packet_source(
       test::RtpFileReader::Create(test::RtpFileReader::kRtpDump,
                                   input_filename));
-  if (packet_source.get() == NULL) {
+  if (packet_source.get() == nullptr) {
     packet_source.reset(test::RtpFileReader::Create(test::RtpFileReader::kPcap,
                                                     input_filename));
-    if (packet_source.get() == NULL) {
-      return NULL;
+    if (packet_source.get() == nullptr) {
+      return nullptr;
     }
   }