This is the first step in order to remove runtime_enabled_features code from WebRTC. Bug: webrtc:9693 Change-Id: Ic67f770c2166755ea45c782efb3e4184433ac15e Reviewed-on: https://webrtc-review.googlesource.com/102361 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Sebastian Jansson <srte@webrtc.org> Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24868}