This decoder is only used for iOS/Mac and it will simplify to make it ObjC++ instead of C++, similar to how the encoder is .mm already. Bug: None Change-Id: I13f62f018432e9c23e7277eea29258a73e1590e1 Reviewed-on: https://chromium-review.googlesource.com/529084 Reviewed-by: Kári Tristan Helgason <kthelgason@webrtc.org> Reviewed-by: Anders Carlsson <andersc@webrtc.org> Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18513}