We want to experiment with adding support for having a webapk also register for http protocol but seemlessly rewriting to https. This is only for main frame requests which fall into its scope. Given that we don't yet have an approved way of specifying this in a manifest (and we aren't sure whether we want it there), let's start conservatively and only add this for unbound webapks.
Comment 1 by yfried...@chromium.org
, Jun 16 2017