Run clang-modernize -use-nullptr over src/extensions/.

extensions/browser/api/socket/tls_socket.cc

Index: extensions/browser/api/socket/tls_socket.cc
diff --git a/extensions/browser/api/socket/tls_socket.cc b/extensions/browser/api/socket/tls_socket.cc
index 3b037dfea9608a7e9283a1b7adfbfc0a7197dac8..eb4f577dbe1f76f39b30ad22afc985f4e8d5490b 100644
--- a/extensions/browser/api/socket/tls_socket.cc
+++ b/extensions/browser/api/socket/tls_socket.cc
@@ -94,17 +94,17 @@ void TLSSocket::Read(int count, const ReadCompletionCallback& callback) {
   DCHECK(!callback.is_null());
 
   if (!read_callback_.is_null()) {
-    callback.Run(net::ERR_IO_PENDING, NULL);
+    callback.Run(net::ERR_IO_PENDING, nullptr);
     return;
   }
 
   if (count <= 0) {
-    callback.Run(net::ERR_INVALID_ARGUMENT, NULL);
+    callback.Run(net::ERR_INVALID_ARGUMENT, nullptr);
     return;
   }
 
   if (!tls_socket_.get() || !IsConnected()) {
-    callback.Run(net::ERR_SOCKET_NOT_CONNECTED, NULL);
+    callback.Run(net::ERR_SOCKET_NOT_CONNECTED, nullptr);
     return;
   }
 
@@ -156,7 +156,7 @@ int TLSSocket::Listen(const std::string& address,
 }
 
 void TLSSocket::Accept(const AcceptCompletionCallback& callback) {
-  callback.Run(net::ERR_FAILED, NULL);
+  callback.Run(net::ERR_FAILED, nullptr);
 }
 
 bool TLSSocket::IsConnected() {
@@ -287,7 +287,7 @@ void TLSSocket::UpgradeSocketToTLS(
   base::Callback<void(int)> connect_cb(base::Bind(
       &TlsConnectDone, base::Passed(&ssl_socket), extension_id, callback));
   int status = saved_ssl_socket->Connect(connect_cb);
-  saved_ssl_socket = NULL;
+  saved_ssl_socket = nullptr;
 
   // Connect completed synchronously, or failed.
   if (status != net::ERR_IO_PENDING) {