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

extensions/browser/api/socket/udp_socket.cc

Index: extensions/browser/api/socket/udp_socket.cc
diff --git a/extensions/browser/api/socket/udp_socket.cc b/extensions/browser/api/socket/udp_socket.cc
index 50da3e23d86abeb9fd489695ce50c67be88035dc..4da81f6a9114d1b88401133ec1bd5b43ef72bd2c 100644
--- a/extensions/browser/api/socket/udp_socket.cc
+++ b/extensions/browser/api/socket/udp_socket.cc
@@ -30,8 +30,9 @@ UDPSocket::UDPSocket(const std::string& owner_extension_id)
     : Socket(owner_extension_id),
       socket_(net::DatagramSocket::DEFAULT_BIND,
               net::RandIntCallback(),
-              NULL,
-              net::NetLog::Source()) {}
+              nullptr,
+              net::NetLog::Source()) {
+}
 
 UDPSocket::~UDPSocket() { Disconnect(); }
 
@@ -80,7 +81,7 @@ void UDPSocket::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;
   } else {
     read_callback_ = callback;
@@ -125,7 +126,7 @@ void UDPSocket::RecvFrom(int count,
   DCHECK(!callback.is_null());
 
   if (!recv_from_callback_.is_null()) {
-    callback.Run(net::ERR_IO_PENDING, NULL, std::string(), 0);
+    callback.Run(net::ERR_IO_PENDING, nullptr, std::string(), 0);
     return;
   } else {
     recv_from_callback_ = callback;