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This CL uses CHECK instead of DCHECK in directories except cast/ and osp/ to align with Chromium's preferences [1]. Some DCHECKs are reserved for performance reasons. cast/ directory is updated in [2] and osp/ directory is updated in [3]. [1] https://chromium.googlesource.com/chromium/src/+/main/styleguide/c++/checks.md [2] https://chromium-review.googlesource.com/c/openscreen/+/5350808 [3] https://chromium-review.googlesource.com/c/openscreen/+/4880923 Bug: none Change-Id: Id7a3d6121ea8b20db4d81cc76384d4098fcd5c9b Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/5350809 Reviewed-by: Mark Foltz <mfoltz@chromium.org>