Make sure the experiment-derived value is used for VP9.
Bug: webrtc:11024
Change-Id: I80b6d388486f2dec793bc8ca872babe6165dcfb2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156562
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29453}