PCMFile.cc uses RTC_DCHECK. include and depend on rtc_base:checks target directly change usage of value_or by using explicit constructor instead of implicit Bug: webrtc:9078 Change-Id: I63c596b8a05b387e56df846b15c33a605fbad4e6 Reviewed-on: https://webrtc-review.googlesource.com/69985 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22897}