Definition
The HTML Geolocation Element defines ActivationBlockersMixinBlockerReason
enum ActivationBlockersMixinBlockerReason {
"", // No blocker reason.
"illegal_subframe", "unsuccessful_registration",
"recently_attached", "intersection_changed",
"intersection_out_of_viewport_or_clipped",
"intersection_occluded_or_distorted", "style_invalid",
"type_invalid",
};