in order to estimate the impact of deprecating SHA1. Chromium UMA CL: https://chromium-review.googlesource.com/c/chromium/src/+/4894345 BUG=webrtc:15517 Change-Id: I5216ba2a8cbba2f276af20d31aa5e111e7c3a141 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/321620 Reviewed-by: David Benjamin <davidben@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Philipp Hancke <phancke@microsoft.com> Cr-Commit-Position: refs/heads/main@{#40882}