See http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20-%20chromium.org&tests=inspector%2Fdebugger%2Fdom-breakpoints.html It's not totally clear when it got crashy since it's a bit inconsistent, but it clearly wasn't crashing for hundreds of runs and now it is. The first crash was at r90739 FWIW.
Chromium has left the building. Won't fix.