Add parentheses around if

Address remaining comments from crrev/c/2336000

Test: none
Bug: none
Change-Id: I7b153dddc977701289f813cafecef018a4902ee0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2379421Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#802979}

ash/public/cpp/external_arc/message_center/arc_notification_item_impl.cc

@@ -92,9 +92,10 @@ void ArcNotificationItemImpl::OnUpdatedFromAndroid(
   if (data->small_icon)
     rich_data.small_image = gfx::Image::CreateFrom1xBitmap(*data->small_icon);
 
-  if (data->accessible_name.has_value())
+  if (data->accessible_name.has_value()) {
     rich_data.accessible_name =
         base::UTF8ToUTF16(data->accessible_name.value());
+  }
 
   if (manager_->IsOpeningSettingsSupported() && !is_setting_shown) {
     rich_data.settings_button_handler =