Move usage of QualityScaler to ViEEncoder.

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

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
index 00a711554d5a5e367f7ebeccf8065d81731c2658..763e6eaad0a8969c540eb51c7319d088b480960f 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.h
@@ -27,7 +27,6 @@
 #include "webrtc/modules/video_coding/include/video_codec_interface.h"
 #include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
 #include "webrtc/modules/video_coding/codecs/vp8/reference_picture_selection.h"
-#include "webrtc/modules/video_coding/utility/quality_scaler.h"
 #include "webrtc/video_frame.h"
 
 namespace webrtc {
@@ -116,8 +115,6 @@ class VP8EncoderImpl : public VP8Encoder {
   std::vector<vpx_codec_ctx_t> encoders_;
   std::vector<vpx_codec_enc_cfg_t> configurations_;
   std::vector<vpx_rational_t> downsampling_factors_;
-  QualityScaler quality_scaler_;
-  bool quality_scaler_enabled_;
 };  // end of VP8EncoderImpl class
 
 class VP8DecoderImpl : public VP8Decoder {