Revert "Reland of Remove SendPacer from ViEEncoder

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index f7c66db4b21c5d77633ef88f57b04eab8458de9a..82ca630ad29842cb3f9baa4dc9b13012f40b0ea4 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -52,9 +52,8 @@ const int Call::Config::kDefaultStartBitrateBps = 300000;
 
 namespace internal {
 
-class Call : public webrtc::Call,
-             public PacketReceiver,
-             public CongestionController::Observer {
+class Call : public webrtc::Call, public PacketReceiver,
+             public BitrateObserver {
  public:
   explicit Call(const Call::Config& config);
   virtual ~Call();
@@ -700,8 +699,10 @@ void Call::OnNetworkChanged(uint32_t target_bitrate_bps, uint8_t fraction_loss,
     pacer_bitrate_sum_kbits_ += pacer_bitrate_bps / 1000;
     ++num_bitrate_updates_;
   }
-  congestion_controller_->SetAllocatedSendBitrate(allocated_bitrate_bps,
-                                                  pad_up_to_bitrate_bps);
+  congestion_controller_->UpdatePacerBitrate(
+      target_bitrate_bps / 1000,
+      PacedSender::kDefaultPaceMultiplier * pacer_bitrate_bps / 1000,
+      pad_up_to_bitrate_bps / 1000);
 }
 
 void Call::ConfigureSync(const std::string& sync_group) {