Replace NULL with nullptr in all C++ files.

webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc

Index: webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc b/webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc
index 41a94d53b06141c8c46e0565aa4f2dcf15f3e84c..4fc45a4fe0ef13499bfb9a54a3ff288e98fd8505 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_sequence_coder.cc
@@ -42,7 +42,7 @@ class Vp8SequenceCoderEncodeCallback : public webrtc::EncodedImageCallback {
 
 Vp8SequenceCoderEncodeCallback::~Vp8SequenceCoderEncodeCallback() {
   delete[] encoded_image_._buffer;
-  encoded_image_._buffer = NULL;
+  encoded_image_._buffer = nullptr;
 }
 
 webrtc::EncodedImageCallback::Result
@@ -52,13 +52,13 @@ Vp8SequenceCoderEncodeCallback::OnEncodedImage(
     const webrtc::RTPFragmentationHeader* fragmentation) {
   if (encoded_image_._size < encoded_image._size) {
     delete[] encoded_image_._buffer;
-    encoded_image_._buffer = NULL;
+    encoded_image_._buffer = nullptr;
     encoded_image_._buffer = new uint8_t[encoded_image._size];
     encoded_image_._size = encoded_image._size;
   }
   memcpy(encoded_image_._buffer, encoded_image._buffer, encoded_image._size);
   encoded_image_._length = encoded_image._length;
-  if (encoded_file_ != NULL) {
+  if (encoded_file_ != nullptr) {
     if (fwrite(encoded_image._buffer, 1, encoded_image._length,
                encoded_file_) != encoded_image._length) {
       return Result(Result::ERROR_SEND_FAILED, 0);
@@ -90,15 +90,15 @@ int Vp8SequenceCoderDecodeCallback::Decoded(webrtc::VideoFrame& image) {
 }
 
 int SequenceCoder(webrtc::test::CommandLineParser* parser) {
-  int width = strtol((parser->GetFlag("w")).c_str(), NULL, 10);
-  int height = strtol((parser->GetFlag("h")).c_str(), NULL, 10);
-  int framerate = strtol((parser->GetFlag("f")).c_str(), NULL, 10);
+  int width = strtol((parser->GetFlag("w")).c_str(), nullptr, 10);
+  int height = strtol((parser->GetFlag("h")).c_str(), nullptr, 10);
+  int framerate = strtol((parser->GetFlag("f")).c_str(), nullptr, 10);
 
   if (width <= 0 || height <= 0 || framerate <= 0) {
     fprintf(stderr, "Error: Resolution cannot be <= 0!\n");
     return -1;
   }
-  int target_bitrate = strtol((parser->GetFlag("b")).c_str(), NULL, 10);
+  int target_bitrate = strtol((parser->GetFlag("b")).c_str(), nullptr, 10);
   if (target_bitrate <= 0) {
     fprintf(stderr, "Error: Bit-rate cannot be <= 0!\n");
     return -1;
@@ -108,27 +108,28 @@ int SequenceCoder(webrtc::test::CommandLineParser* parser) {
   // Open input file.
   std::string encoded_file_name = parser->GetFlag("encoded_file");
   FILE* encoded_file = fopen(encoded_file_name.c_str(), "wb");
-  if (encoded_file == NULL) {
+  if (encoded_file == nullptr) {
     fprintf(stderr, "Error: Cannot open encoded file\n");
     return -1;
   }
   std::string input_file_name = parser->GetFlag("input_file");
   FILE* input_file = fopen(input_file_name.c_str(), "rb");
-  if (input_file == NULL) {
+  if (input_file == nullptr) {
     fprintf(stderr, "Error: Cannot open input file\n");
     return -1;
   }
   // Open output file.
   std::string output_file_name = parser->GetFlag("output_file");
   FILE* output_file = fopen(output_file_name.c_str(), "wb");
-  if (output_file == NULL) {
+  if (output_file == nullptr) {
     fprintf(stderr, "Error: Cannot open output file\n");
     return -1;
   }
 
   // Get range of frames: will encode num_frames following start_frame).
-  int start_frame = strtol((parser->GetFlag("start_frame")).c_str(), NULL, 10);
-  int num_frames = strtol((parser->GetFlag("num_frames")).c_str(), NULL, 10);
+  int start_frame =
+      strtol((parser->GetFlag("start_frame")).c_str(), nullptr, 10);
+  int num_frames = strtol((parser->GetFlag("num_frames")).c_str(), nullptr, 10);
 
   // Codec SetUp.
   webrtc::VideoCodec inst;
@@ -172,9 +173,9 @@ int SequenceCoder(webrtc::test::CommandLineParser* parser) {
       break;
     }
     if (frame_cnt >= start_frame) {
-      encoder->Encode(VideoFrame(buffer, webrtc::kVideoRotation_0, 0),
-                      NULL, NULL);
-      decoder->Decode(encoder_callback.encoded_image(), false, NULL);
+      encoder->Encode(VideoFrame(buffer, webrtc::kVideoRotation_0, 0), nullptr,
+                      nullptr);
+      decoder->Decode(encoder_callback.encoded_image(), false, nullptr);
       ++frames_processed;
     }
     ++frame_cnt;