Revisiting this, I've written a patch which seems like it should work, but it only passes the XMLHttpRequest versions of the tests. The fetch ones are getting a blank result from the channel's `GetProtocolVersion`, rather than `"h2"`, and I'm not familiar enough with the code to figure out why. For now I'll just attach a patch here in case someone else has any clues.
Bug 1397646 Comment 23 Edit History
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Revisiting this, I've written a patch which seems like it should work, but it only passes the XMLHttpRequest versions of the tests. The fetch ones are getting an empty string from the channel's `GetProtocolVersion`, rather than `"h2"`, and I'm not familiar enough with the code to figure out why. For now I'll just attach a patch here in case someone else has any clues.