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

extensions/browser/api/bluetooth/bluetooth_private_api.cc

Index: extensions/browser/api/bluetooth/bluetooth_private_api.cc
diff --git a/extensions/browser/api/bluetooth/bluetooth_private_api.cc b/extensions/browser/api/bluetooth/bluetooth_private_api.cc
index 8729f73b108488a895bd50d54e6f093b6118634e..684ca8784e06581fc64b77eb8a3d419718c32566 100644
--- a/extensions/browser/api/bluetooth/bluetooth_private_api.cc
+++ b/extensions/browser/api/bluetooth/bluetooth_private_api.cc
@@ -86,8 +86,8 @@ bool ValidatePairingResponseOptions(
     const device::BluetoothDevice* device,
     const bt_private::SetPairingResponseOptions& options) {
   bool response = options.response != bt_private::PAIRING_RESPONSE_NONE;
-  bool pincode = options.pincode.get() != NULL;
-  bool passkey = options.passkey.get() != NULL;
+  bool pincode = options.pincode.get() != nullptr;
+  bool passkey = options.passkey.get() != nullptr;
 
   if (!response && !pincode && !passkey)
     return false;
@@ -220,8 +220,8 @@ void BluetoothPrivateSetAdapterStateFunction::SendError() {
 
   std::vector<std::string> replacements(1);
   replacements[0] = JoinString(failed_vector, ", ");
-  std::string error =
-      ReplaceStringPlaceholders(kSetAdapterPropertyError, replacements, NULL);
+  std::string error = ReplaceStringPlaceholders(
+      kSetAdapterPropertyError, replacements, nullptr);
   SetError(error);
   SendResponse(false);
 }