This CL harmonizes and improves the naming of the config structs
in the VideoProcessor tests. It should have no functional implications.
CodecConfigPars -> CodecParams:
This struct mainly contains codec settings.
QualityMetrics -> QualityThresholds:
This struct contains thresholds against which the calculated
PSNR and SSIM metrics are compared to.
RateControlMetrics -> RateControlThresholds:
This struct contains thresholds against which the calculated
rate control metrics are compared to.
BUG=webrtc:6634
Review-Url: https://codereview.webrtc.org/2703333004
Cr-Commit-Position: refs/heads/master@{#16794}
1e46434e7e