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 c6014e665183bc07ce31171b4a3e0411bb9a20c8..dc8eb3e276938de4871d608b262de5cadfdba612 100644
--- a/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h
+++ b/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.h
@@ -54,6 +54,8 @@ 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;
@@ -64,7 +66,6 @@ class H264EncoderImpl : public H264Encoder {
   SEncParamExt CreateEncoderParams() const;
 
   webrtc::H264BitstreamParser h264_bitstream_parser_;
-  QualityScaler quality_scaler_;
   // Reports statistics with histograms.
   void ReportInit();
   void ReportError();