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

extensions/common/api/bluetooth/bluetooth_manifest_handler.cc

Index: extensions/common/api/bluetooth/bluetooth_manifest_handler.cc
diff --git a/extensions/common/api/bluetooth/bluetooth_manifest_handler.cc b/extensions/common/api/bluetooth/bluetooth_manifest_handler.cc
index da143fa8c2fb52262f17a4a848b4a9ec88a9bdd3..235beb06c5825fe8d96792dc31bdb4bf3bb593fd 100644
--- a/extensions/common/api/bluetooth/bluetooth_manifest_handler.cc
+++ b/extensions/common/api/bluetooth/bluetooth_manifest_handler.cc
@@ -17,7 +17,7 @@ BluetoothManifestHandler::~BluetoothManifestHandler() {}
 
 bool BluetoothManifestHandler::Parse(Extension* extension,
                                      base::string16* error) {
-  const base::Value* bluetooth = NULL;
+  const base::Value* bluetooth = nullptr;
   CHECK(extension->manifest()->Get(manifest_keys::kBluetooth, &bluetooth));
   scoped_ptr<BluetoothManifestData> data =
       BluetoothManifestData::FromValue(*bluetooth, error);
@@ -37,7 +37,7 @@ ManifestPermission* BluetoothManifestHandler::CreateInitialRequiredPermission(
   BluetoothManifestData* data = BluetoothManifestData::Get(extension);
   if (data)
     return data->permission()->Clone();
-  return NULL;
+  return nullptr;
 }
 
 const std::vector<std::string> BluetoothManifestHandler::Keys() const {