If minQP is reached and encoder undershoot consistently, we consider the
quality good enough and throttle encode frame rate.
This CL also adds perf tests for high fps vp9 screenshare.
Bug: webrtc:10310
Change-Id: I49fc7d31f9f596a9ecb5f85fe9e0c7861d4915f9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/125761
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26997}
6117068af4