Inspired by V8 CL: crrev.com/c/3038528.
This makes the WebRTC's dcheck control independent of Chromium's and
prepares switching Chromium's default behavior without affecting
WebRTC developers or builders.
Preparation for: https://crrev.com/c/2893204
Bug: chromium:1225701, webrtc:12988
Change-Id: Ia0d21f9fb8e9d7704fd1beca16504c301a263b3b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226465
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Markus Handell <handellm@webrtc.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#34512}