replace NULL->nullptr in src/remoting.

remoting/host/cast_extension_session.cc

Index: remoting/host/cast_extension_session.cc
diff --git a/remoting/host/cast_extension_session.cc b/remoting/host/cast_extension_session.cc
index 140b41d3baeda2425ccafd49245473b9ea449170..72d1e9ead834da38396f9c3cff67da70c7f1ada2 100644
--- a/remoting/host/cast_extension_session.cc
+++ b/remoting/host/cast_extension_session.cc
@@ -96,7 +96,7 @@ class CastCreateSessionDescriptionObserver
         session);
   }
   void OnSuccess(webrtc::SessionDescriptionInterface* desc) override {
-    if (cast_extension_session_ == NULL) {
+    if (cast_extension_session_ == nullptr) {
       LOG(ERROR)
           << "No CastExtensionSession. Creating session description succeeded.";
       return;
@@ -104,7 +104,7 @@ class CastCreateSessionDescriptionObserver
     cast_extension_session_->OnCreateSessionDescription(desc);
   }
   void OnFailure(const std::string& error) override {
-    if (cast_extension_session_ == NULL) {
+    if (cast_extension_session_ == nullptr) {
       LOG(ERROR)
           << "No CastExtensionSession. Creating session description failed.";
       return;
@@ -162,7 +162,7 @@ CastExtensionSession::~CastExtensionSession() {
   // Explicitly clear |create_session_desc_observer_|'s pointer to |this|,
   // since the CastExtensionSession is destructing. Otherwise,
   // |create_session_desc_observer_| would be left with a dangling pointer.
-  create_session_desc_observer_->SetCastExtensionSession(NULL);
+  create_session_desc_observer_->SetCastExtensionSession(nullptr);
 
   CleanupPeerConnection();
 }
@@ -239,7 +239,7 @@ void CastExtensionSession::OnCreateVideoCapturer(
   if (received_offer_) {
     has_grabbed_capturer_ = true;
     if (SetupVideoStream(capturer->Pass())) {
-      peer_connection_->CreateAnswer(create_session_desc_observer_, NULL);
+      peer_connection_->CreateAnswer(create_session_desc_observer_, nullptr);
     } else {
       has_grabbed_capturer_ = false;
       // Ignore the received offer, since we failed to setup a video stream.
@@ -313,8 +313,8 @@ CastExtensionSession::CastExtensionSession(
       stats_observer_(CastStatsObserver::Create()),
       received_offer_(false),
       has_grabbed_capturer_(false),
-      signaling_thread_wrapper_(NULL),
-      worker_thread_wrapper_(NULL),
+      signaling_thread_wrapper_(nullptr),
+      worker_thread_wrapper_(nullptr),
       worker_thread_(kWorkerThreadName) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
   DCHECK(url_request_context_getter_.get());
@@ -331,7 +331,7 @@ CastExtensionSession::CastExtensionSession(
 
 bool CastExtensionSession::ParseAndSetRemoteDescription(
     base::DictionaryValue* message) {
-  DCHECK(peer_connection_.get() != NULL);
+  DCHECK(peer_connection_.get() != nullptr);
 
   base::DictionaryValue* message_data;
   if (!message->GetDictionary(kTopLevelData, &message_data)) {
@@ -369,7 +369,7 @@ bool CastExtensionSession::ParseAndSetRemoteDescription(
 
 bool CastExtensionSession::ParseAndAddICECandidate(
     base::DictionaryValue* message) {
-  DCHECK(peer_connection_.get() != NULL);
+  DCHECK(peer_connection_.get() != nullptr);
 
   base::DictionaryValue* message_data;
   if (!message->GetDictionary(kTopLevelData, &message_data)) {
@@ -409,7 +409,7 @@ bool CastExtensionSession::SendMessageToClient(const std::string& subject,
                                                const std::string& data) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
-  if (client_stub_ == NULL) {
+  if (client_stub_ == nullptr) {
     LOG(ERROR) << "No Client Stub. Cannot send message to client.";
     return false;
   }
@@ -437,7 +437,7 @@ void CastExtensionSession::EnsureTaskAndSetSend(rtc::Thread** ptr,
   jingle_glue::JingleThreadWrapper::current()->set_send_allowed(true);
   *ptr = jingle_glue::JingleThreadWrapper::current();
 
-  if (event != NULL) {
+  if (event != nullptr) {
     event->Signal();
   }
 }
@@ -446,7 +446,7 @@ bool CastExtensionSession::WrapTasksAndSave() {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
   EnsureTaskAndSetSend(&signaling_thread_wrapper_);
-  if (signaling_thread_wrapper_ == NULL)
+  if (signaling_thread_wrapper_ == nullptr)
     return false;
 
   base::WaitableEvent wrap_worker_thread_event(true, false);
@@ -458,18 +458,19 @@ bool CastExtensionSession::WrapTasksAndSave() {
                  &wrap_worker_thread_event));
   wrap_worker_thread_event.Wait();
 
-  return (worker_thread_wrapper_ != NULL);
+  return (worker_thread_wrapper_ != nullptr);
 }
 
 bool CastExtensionSession::InitializePeerConnection() {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
   DCHECK(!peer_conn_factory_);
   DCHECK(!peer_connection_);
-  DCHECK(worker_thread_wrapper_ != NULL);
-  DCHECK(signaling_thread_wrapper_ != NULL);
+  DCHECK(worker_thread_wrapper_ != nullptr);
+  DCHECK(signaling_thread_wrapper_ != nullptr);
 
   peer_conn_factory_ = webrtc::CreatePeerConnectionFactory(
-      worker_thread_wrapper_, signaling_thread_wrapper_, NULL, NULL, NULL);
+      worker_thread_wrapper_, signaling_thread_wrapper_, nullptr, nullptr,
+      nullptr);
 
   if (!peer_conn_factory_.get()) {
     CleanupPeerConnection();
@@ -499,7 +500,7 @@ bool CastExtensionSession::InitializePeerConnection() {
           network_settings_, url_request_context_getter_);
 
   peer_connection_ = peer_conn_factory_->CreatePeerConnection(
-      rtc_config, &constraints, port_allocator_factory, NULL, this);
+      rtc_config, &constraints, port_allocator_factory, nullptr, this);
 
   if (!peer_connection_.get()) {
     CleanupPeerConnection();
@@ -572,14 +573,14 @@ void CastExtensionSession::PollPeerConnectionStats() {
 
 void CastExtensionSession::CleanupPeerConnection() {
   peer_connection_->Close();
-  peer_connection_ = NULL;
-  stream_ = NULL;
-  peer_conn_factory_ = NULL;
+  peer_connection_ = nullptr;
+  stream_ = nullptr;
+  peer_conn_factory_ = nullptr;
   worker_thread_.Stop();
 }
 
 bool CastExtensionSession::connection_active() const {
-  return peer_connection_.get() != NULL;
+  return peer_connection_.get() != nullptr;
 }
 
 // webrtc::PeerConnectionObserver implementation -------------------------------