Remove SendPacer from ViEEncoder and make sure SendPacer starts at a valid bitrate

webrtc/modules/remote_bitrate_estimator/test/packet_sender.cc

Index: webrtc/modules/remote_bitrate_estimator/test/packet_sender.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/test/packet_sender.cc b/webrtc/modules/remote_bitrate_estimator/test/packet_sender.cc
index 3bcbc0a071bf8ef7e587f2f80a91ed11b62512d1..0bcec82482729b2d39f263cc54fe081a22d5a38d 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/packet_sender.cc
+++ b/webrtc/modules/remote_bitrate_estimator/test/packet_sender.cc
@@ -157,13 +157,9 @@ PacedVideoSender::PacedVideoSender(PacketProcessorListener* listener,
                                    VideoSource* source,
                                    BandwidthEstimatorType estimator)
     : VideoSender(listener, source, estimator),
-      pacer_(&clock_,
-             this,
-             source->bits_per_second() / 1000,
-             PacedSender::kDefaultPaceMultiplier * source->bits_per_second() /
-                 1000,
-             0) {
+      pacer_(&clock_, this) {
   modules_.push_back(&pacer_);
+  pacer_.SetEstimatedBitrate(source->bits_per_second());
 }
 
 PacedVideoSender::~PacedVideoSender() {
@@ -310,9 +306,7 @@ void PacedVideoSender::OnNetworkChanged(uint32_t target_bitrate_bps,
                                         uint8_t fraction_lost,
                                         int64_t rtt) {
   VideoSender::OnNetworkChanged(target_bitrate_bps, fraction_lost, rtt);
-  pacer_.UpdateBitrate(
-      target_bitrate_bps / 1000,
-      PacedSender::kDefaultPaceMultiplier * target_bitrate_bps / 1000, 0);
+  pacer_.SetEstimatedBitrate(target_bitrate_bps);
 }
 
 const int kNoLimit = std::numeric_limits<int>::max();