Revert of Make QualityScaler more responsive to downgrades. (patchset #3 id:40001 of https://codereview.webrtc.org/1830593003/ )

Reason for revert:
Speculative revert: want to see if this causes the regression in https://crbug.com/602621

Original issue's description:
> Make QualityScaler more responsive to downgrades.
>
> Permits going from HD to QVGA in 6 seconds instead of 10. Also adds
> windows for going up quickly in the beginning of a call (before any
> downscaling happens due to bad quality).
>
> BUG=webrtc:5678
> R=glaznev@webrtc.org, stefan@webrtc.org
>
> Committed: https://crrev.com/85829fd90cc4e7a91c9857921b19e8fc126aeb60
> Cr-Commit-Position: refs/heads/master@{#12219}

TBR=glaznev@webrtc.org,stefan@webrtc.org,pbos@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:5678
NOTRY=true

Review URL: https://codereview.webrtc.org/1880103002

Cr-Commit-Position: refs/heads/master@{#12331}

webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc

@@ -604,8 +604,8 @@ int VP8EncoderImpl::InitEncode(const VideoCodec* inst,
   // TODO(glaznev/sprang): consider passing codec initial bitrate to quality
   // scaler to avoid starting with HD for low initial bitrates.
   quality_scaler_.Init(codec_.qpMax / QualityScaler::kDefaultLowQpDenominator,
-                       kDisabledBadQpThreshold, false, 0, 0, 0,
-                       codec_.maxFramerate);
+                       kDisabledBadQpThreshold, false, 0, 0, 0);
+  quality_scaler_.ReportFramerate(codec_.maxFramerate);
 
   // Only apply scaling to improve for single-layer streams. The scaling metrics
   // use frame drops as a signal and is only applicable when we drop frames.