Wave files may contain optional chunks, such as a metadata one. This CL makes WavReader tolerant to such chunks - it just ignores them. For more details on the Wave format, please refer to https://sites.google.com/site/musicgapi/technical-documents/wav-file-format. Bug: webrtc:8762 Change-Id: Ie0e19dea75661808e7781f51faa1d0f0affeb3e1 Reviewed-on: https://webrtc-review.googlesource.com/c/40300 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25562}