This is done to make UBSan testing more convenient in integration with projects using WebRTC Some blacklist entries were obsolete so don't need a replacement Also fix one of the warnings (thanks, kwiberg@) BUG=webrtc:8189, webrtc:5486, webrtc:5491 Review-Url: https://codereview.webrtc.org/3009123002 Cr-Commit-Position: refs/heads/master@{#19682}