This prevents printing warning messages when the extensions aren't found. The real parsing is done deeper in the stack and is unaffected. Bug: webrtc:9510 Change-Id: Idf09f0e69c223bd4217be7044d21d1d0bbbdab92 Reviewed-on: https://webrtc-review.googlesource.com/c/110615 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25612}