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

extensions/browser/api/sockets_tcp/sockets_tcp_api.cc

Index: extensions/browser/api/sockets_tcp/sockets_tcp_api.cc
diff --git a/extensions/browser/api/sockets_tcp/sockets_tcp_api.cc b/extensions/browser/api/sockets_tcp/sockets_tcp_api.cc
index 6a7204c1dd9b4ff97e778d4e3632bc164e4ba0dc..036439b453d6076699bc1990c97b4e4701157e08 100644
--- a/extensions/browser/api/sockets_tcp/sockets_tcp_api.cc
+++ b/extensions/browser/api/sockets_tcp/sockets_tcp_api.cc
@@ -157,7 +157,8 @@ void SocketsTcpUpdateFunction::Work() {
 }
 
 SocketsTcpSetPausedFunction::SocketsTcpSetPausedFunction()
-    : socket_event_dispatcher_(NULL) {}
+    : socket_event_dispatcher_(nullptr) {
+}
 
 SocketsTcpSetPausedFunction::~SocketsTcpSetPausedFunction() {}
 
@@ -171,7 +172,7 @@ bool SocketsTcpSetPausedFunction::Prepare() {
          "If this assertion is failing during a test, then it is likely that "
          "TestExtensionSystem is failing to provide an instance of "
          "TCPSocketEventDispatcher.";
-  return socket_event_dispatcher_ != NULL;
+  return socket_event_dispatcher_ != nullptr;
 }
 
 void SocketsTcpSetPausedFunction::Work() {
@@ -243,7 +244,8 @@ void SocketsTcpSetNoDelayFunction::Work() {
 }
 
 SocketsTcpConnectFunction::SocketsTcpConnectFunction()
-    : socket_event_dispatcher_(NULL) {}
+    : socket_event_dispatcher_(nullptr) {
+}
 
 SocketsTcpConnectFunction::~SocketsTcpConnectFunction() {}
 
@@ -257,7 +259,7 @@ bool SocketsTcpConnectFunction::Prepare() {
          "If this assertion is failing during a test, then it is likely that "
          "TestExtensionSystem is failing to provide an instance of "
          "TCPSocketEventDispatcher.";
-  return socket_event_dispatcher_ != NULL;
+  return socket_event_dispatcher_ != nullptr;
 }
 
 void SocketsTcpConnectFunction::AsyncWorkStart() {
@@ -436,7 +438,7 @@ bool SocketsTcpGetSocketsFunction::Prepare() { return true; }
 void SocketsTcpGetSocketsFunction::Work() {
   std::vector<linked_ptr<sockets_tcp::SocketInfo> > socket_infos;
   base::hash_set<int>* resource_ids = GetSocketIds();
-  if (resource_ids != NULL) {
+  if (resource_ids != nullptr) {
     for (base::hash_set<int>::iterator it = resource_ids->begin();
          it != resource_ids->end();
          ++it) {
@@ -483,7 +485,7 @@ void SocketsTcpSecureFunction::AsyncWorkStart() {
   // Make sure it's a connected TCP client socket. Error out if it's already
   // secure()'d.
   if (socket->GetSocketType() != Socket::TYPE_TCP ||
-      socket->ClientStream() == NULL) {
+      socket->ClientStream() == nullptr) {
     SetResult(new base::FundamentalValue(net::ERR_INVALID_ARGUMENT));
     error_ = kInvalidSocketStateError;
     AsyncWorkCompleted();
@@ -529,7 +531,7 @@ void SocketsTcpSecureFunction::AsyncWorkStart() {
 void SocketsTcpSecureFunction::TlsConnectDone(scoped_ptr<TLSSocket> socket,
                                               int result) {
   // If an error occurred, socket MUST be NULL
-  DCHECK(result == net::OK || socket == NULL);
+  DCHECK(result == net::OK || socket == nullptr);
 
   if (socket && result == net::OK) {
     socket->set_persistent(persistent_);