Move usage of QualityScaler to ViEEncoder.

webrtc/media/engine/videoencodersoftwarefallbackwrapper.cc

Index: webrtc/media/engine/videoencodersoftwarefallbackwrapper.cc
diff --git a/webrtc/media/engine/videoencodersoftwarefallbackwrapper.cc b/webrtc/media/engine/videoencodersoftwarefallbackwrapper.cc
index 0de15b3d8fd94d94e6d87a4e60a352e241563ac2..a4d865e80d4df538d8cbf972e011e0a7dc5b9b69 100644
--- a/webrtc/media/engine/videoencodersoftwarefallbackwrapper.cc
+++ b/webrtc/media/engine/videoencodersoftwarefallbackwrapper.cc
@@ -159,16 +159,15 @@ int32_t VideoEncoderSoftwareFallbackWrapper::SetRateAllocation(
   return ret;
 }
 
-void VideoEncoderSoftwareFallbackWrapper::OnDroppedFrame() {
-  if (fallback_encoder_)
-    return fallback_encoder_->OnDroppedFrame();
-  return encoder_->OnDroppedFrame();
-}
-
 bool VideoEncoderSoftwareFallbackWrapper::SupportsNativeHandle() const {
   if (fallback_encoder_)
     return fallback_encoder_->SupportsNativeHandle();
   return encoder_->SupportsNativeHandle();
 }
 
+VideoEncoder::ScalingSettings
+VideoEncoderSoftwareFallbackWrapper::GetScalingSettings() const {
+  return encoder_->GetScalingSettings();
+}
+
 }  // namespace webrtc