Replace NULL with nullptr in all C++ files.

webrtc/examples/peerconnection/client/conductor.cc

Index: webrtc/examples/peerconnection/client/conductor.cc
diff --git a/webrtc/examples/peerconnection/client/conductor.cc b/webrtc/examples/peerconnection/client/conductor.cc
index 8c288ebf266dc374a29965a26e9855240b8775e1..c74f7c28d991e7a486f735198e20647a171caf48 100644
--- a/webrtc/examples/peerconnection/client/conductor.cc
+++ b/webrtc/examples/peerconnection/client/conductor.cc
@@ -63,11 +63,11 @@ Conductor::Conductor(PeerConnectionClient* client, MainWindow* main_wnd)
 }
 
 Conductor::~Conductor() {
-  RTC_DCHECK(peer_connection_.get() == NULL);
+  RTC_DCHECK(peer_connection_.get() == nullptr);
 }
 
 bool Conductor::connection_active() const {
-  return peer_connection_.get() != NULL;
+  return peer_connection_.get() != nullptr;
 }
 
 void Conductor::Close() {
@@ -76,8 +76,8 @@ void Conductor::Close() {
 }
 
 bool Conductor::InitializePeerConnection() {
-  RTC_DCHECK(peer_connection_factory_.get() == NULL);
-  RTC_DCHECK(peer_connection_.get() == NULL);
+  RTC_DCHECK(peer_connection_factory_.get() == nullptr);
+  RTC_DCHECK(peer_connection_.get() == nullptr);
 
   peer_connection_factory_  = webrtc::CreatePeerConnectionFactory();
 
@@ -94,25 +94,25 @@ bool Conductor::InitializePeerConnection() {
     DeletePeerConnection();
   }
   AddStreams();
-  return peer_connection_.get() != NULL;
+  return peer_connection_.get() != nullptr;
 }
 
 bool Conductor::ReinitializePeerConnectionForLoopback() {
   loopback_ = true;
   rtc::scoped_refptr<webrtc::StreamCollectionInterface> streams(
       peer_connection_->local_streams());
-  peer_connection_ = NULL;
+  peer_connection_ = nullptr;
   if (CreatePeerConnection(DTLS_OFF)) {
     for (size_t i = 0; i < streams->count(); ++i)
       peer_connection_->AddStream(streams->at(i));
-    peer_connection_->CreateOffer(this, NULL);
+    peer_connection_->CreateOffer(this, nullptr);
   }
-  return peer_connection_.get() != NULL;
+  return peer_connection_.get() != nullptr;
 }
 
 bool Conductor::CreatePeerConnection(bool dtls) {
-  RTC_DCHECK(peer_connection_factory_.get() != NULL);
-  RTC_DCHECK(peer_connection_.get() == NULL);
+  RTC_DCHECK(peer_connection_factory_.get() != nullptr);
+  RTC_DCHECK(peer_connection_.get() == nullptr);
 
   webrtc::PeerConnectionInterface::RTCConfiguration config;
   webrtc::PeerConnectionInterface::IceServer server;
@@ -129,22 +129,22 @@ bool Conductor::CreatePeerConnection(bool dtls) {
   }
 
   peer_connection_ = peer_connection_factory_->CreatePeerConnection(
-      config, &constraints, NULL, NULL, this);
-  return peer_connection_.get() != NULL;
+      config, &constraints, nullptr, nullptr, this);
+  return peer_connection_.get() != nullptr;
 }
 
 void Conductor::DeletePeerConnection() {
-  peer_connection_ = NULL;
+  peer_connection_ = nullptr;
   active_streams_.clear();
   main_wnd_->StopLocalRenderer();
   main_wnd_->StopRemoteRenderer();
-  peer_connection_factory_ = NULL;
+  peer_connection_factory_ = nullptr;
   peer_id_ = -1;
   loopback_ = false;
 }
 
 void Conductor::EnsureStreamingUI() {
-  RTC_DCHECK(peer_connection_.get() != NULL);
+  RTC_DCHECK(peer_connection_.get() != nullptr);
   if (main_wnd_->IsWindow()) {
     if (main_wnd_->current_ui() != MainWindow::STREAMING)
       main_wnd_->SwitchToStreamingUI();
@@ -221,7 +221,7 @@ void Conductor::OnPeerDisconnected(int id) {
   LOG(INFO) << __FUNCTION__;
   if (id == peer_id_) {
     LOG(INFO) << "Our peer disconnected";
-    main_wnd_->QueueUIThreadCallback(PEER_CONNECTION_CLOSED, NULL);
+    main_wnd_->QueueUIThreadCallback(PEER_CONNECTION_CLOSED, nullptr);
   } else {
     // Refresh the list if we're showing it.
     if (main_wnd_->current_ui() == MainWindow::LIST_PEERS)
@@ -290,7 +290,7 @@ void Conductor::OnMessageFromPeer(int peer_id, const std::string& message) {
         DummySetSessionDescriptionObserver::Create(), session_description);
     if (session_description->type() ==
         webrtc::SessionDescriptionInterface::kOffer) {
-      peer_connection_->CreateAnswer(this, NULL);
+      peer_connection_->CreateAnswer(this, nullptr);
     }
     return;
   } else {
@@ -324,7 +324,7 @@ void Conductor::OnMessageFromPeer(int peer_id, const std::string& message) {
 
 void Conductor::OnMessageSent(int err) {
   // Process the next pending message if any.
-  main_wnd_->QueueUIThreadCallback(SEND_MESSAGE_TO_PEER, NULL);
+  main_wnd_->QueueUIThreadCallback(SEND_MESSAGE_TO_PEER, nullptr);
 }
 
 void Conductor::OnServerConnectionFailure() {
@@ -360,7 +360,7 @@ void Conductor::ConnectToPeer(int peer_id) {
 
   if (InitializePeerConnection()) {
     peer_id_ = peer_id;
-    peer_connection_->CreateOffer(this, NULL);
+    peer_connection_->CreateOffer(this, nullptr);
   } else {
     main_wnd_->MessageBox("Error", "Failed to initialize PeerConnection", true);
   }
@@ -402,13 +402,12 @@ void Conductor::AddStreams() {
 
   rtc::scoped_refptr<webrtc::AudioTrackInterface> audio_track(
       peer_connection_factory_->CreateAudioTrack(
-          kAudioLabel, peer_connection_factory_->CreateAudioSource(NULL)));
+          kAudioLabel, peer_connection_factory_->CreateAudioSource(nullptr)));
 
   rtc::scoped_refptr<webrtc::VideoTrackInterface> video_track(
       peer_connection_factory_->CreateVideoTrack(
-          kVideoLabel,
-          peer_connection_factory_->CreateVideoSource(OpenVideoCaptureDevice(),
-                                                      NULL)));
+          kVideoLabel, peer_connection_factory_->CreateVideoSource(
+                           OpenVideoCaptureDevice(), nullptr)));
   main_wnd_->StartLocalRenderer(video_track);
 
   rtc::scoped_refptr<webrtc::MediaStreamInterface> stream =