e.g. https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Win7%20Tests%20%28dbg%29%281%29/71778 (but appears across multiple bots going back some time)

New failures:
FAIL insertDTMF() with default duration and intertoneGap should fire tonechange events at the expected time assert_approx_equals: Expect tonechange event for "2" to be fired approximately after 170 milliseconds expected 170 +/- 400 but got 794
FAIL insertDTMF() with explicit duration and intertoneGap should fire tonechange events at the expected time assert_approx_equals: Expect tonechange event for "B" to be fired approximately after 170 milliseconds expected 170 +/- 400 but got 780
FAIL Calling insertDTMF() multiple times in the middle of tonechange events should cause future tonechanges to be updated the last provided tones assert_equals: Expect current event.tone to be 3 expected "3" but got "1"

Since I can't get the flakiness dashboard to show me when this started (but it wasn't in the last couple days), going to disable and leave to WebRTC folk to triage further.