See CL https://chromium-review.googlesource.com/c/chromium/src/+/841266
which touches content/public but only for unit test code. I.e. there is no change to web visible content.

Example failing build:
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux_chromium_rel_ng/113597

Swarming task:
https://chromium-swarm.appspot.com/task?id=3df9d06e9ba11d10&refresh=10&show_raw=1

Failure logs don't seem exciting:
13:20:52.921 4125 worker/1 virtual/threaded/http/tests/devtools/tracing/timeline-paint/timeline-paint-with-layout-invalidations.js failed:
13:20:52.921 4125 worker/1  text diff