background: https://chromium-review.googlesource.com/c/chromium/src/+/1026195
1) I'll add comment to clarify this - how to interpret callback.
2), so far there are 4 callers for Load API. The latest one chrome/browser/chromeos/crostini/crostini_manager.cc tends to check error code which is a good sign - once we provide an error code, developers naturally check it. The the only one left is media_perception_api_manager.cc which I'm going to address it together with 1).
Comment 1 by xiaochu@chromium.org
, May 16 2018