Move usage of QualityScaler to ViEEncoder.

webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h

Index: webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h
diff --git a/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h b/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h
index a88377b6e7ad3003feb690482124c598d3f2172b..0561a4574020d3a1f337681fa486f8efca89d471 100644
--- a/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h
+++ b/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h
@@ -54,17 +54,17 @@ class H264EncoderImpl : public H264Encoder {
 
   const char* ImplementationName() const override;
 
+  QualityScaler::Settings GetQPThresholds() const override;
+
   // Unsupported / Do nothing.
   int32_t SetChannelParameters(uint32_t packet_loss, int64_t rtt) override;
   int32_t SetPeriodicKeyFrames(bool enable) override;
-  void OnDroppedFrame() override;
 
  private:
   bool IsInitialized() const;
   SEncParamExt CreateEncoderParams() const;
 
   webrtc::H264BitstreamParser h264_bitstream_parser_;
-  QualityScaler quality_scaler_;
   // Reports statistics with histograms.
   void ReportInit();
   void ReportError();