Move usage of QualityScaler to ViEEncoder.

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

Index: webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
index 32472750f5f0fc21df8512431ece44af806377d7..6026cb31d2b0c29972bcf897854755dfabd1396a 100644
--- a/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/simulcast_encoder_adapter.cc
@@ -451,10 +451,6 @@ bool SimulcastEncoderAdapter::Initialized() const {
   return !streaminfos_.empty();
 }
 
-void SimulcastEncoderAdapter::OnDroppedFrame() {
-  streaminfos_[0].encoder->OnDroppedFrame();
-}
-
 bool SimulcastEncoderAdapter::SupportsNativeHandle() const {
   // We should not be calling this method before streaminfos_ are configured.
   RTC_DCHECK(!streaminfos_.empty());
@@ -465,6 +461,14 @@ bool SimulcastEncoderAdapter::SupportsNativeHandle() const {
   return true;
 }
 
+VideoEncoder::ScalingSettings SimulcastEncoderAdapter::GetScalingSettings()
+    const {
+  // Turn off quality scaling for simulcast.
+  if (NumberOfStreams(codec_) != 1)
+    return VideoEncoder::ScalingSettings(false);
+  return streaminfos_[0].encoder->GetScalingSettings();
+}
+
 const char* SimulcastEncoderAdapter::ImplementationName() const {
   return implementation_name_.c_str();
 }