The replacements are absl::EqualsIgnoreCase and absl::StartsWithIgnoreCase. Also delete the alias RtpUtility::StringCompare. Bug: webrtc:6424 Change-Id: I4bed71540264450f85137ad0c2564125c5c6213f Reviewed-on: https://webrtc-review.googlesource.com/c/109006 Commit-Queue: Niels Moller <nisse@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25481}