Bug 1822876: Add H3 ECH Telemetry. r=kershaw,necko-reviewers
This patch adds telemetry which records when H3 connections succeed / fail
and what kind of ECH they used. Our H3 ECH tests are extended to test these
different modes and that the telemetry is recorded correctly.
Differential Revision:
https://phabricator.services.mozilla.com/D172813
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<title>Crashtest for bug 839753</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<pre id="test">
<script class="testbody" type="text/javascript">
(new AudioContext()).destination.expando = null;
ok(true, "The test should not trigger wrapper cache assertions");
</script>
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