Revert of Remove SendPacer from ViEEncoder

webrtc/modules/bitrate_controller/include/bitrate_controller.h

Index: webrtc/modules/bitrate_controller/include/bitrate_controller.h
diff --git a/webrtc/modules/bitrate_controller/include/bitrate_controller.h b/webrtc/modules/bitrate_controller/include/bitrate_controller.h
index a61cf6a7a74f139ae972170c968be7e07a1a8ad5..d6cbc02d189c1cdbc183a8c0ed86eb3cf51f4797 100644
--- a/webrtc/modules/bitrate_controller/include/bitrate_controller.h
+++ b/webrtc/modules/bitrate_controller/include/bitrate_controller.h
@@ -18,7 +18,6 @@
 #include <map>
 
 #include "webrtc/modules/include/module.h"
-#include "webrtc/modules/pacing/paced_sender.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 
 namespace webrtc {
@@ -27,8 +26,6 @@
 class RtcEventLog;
 struct PacketInfo;
 
-// Deprecated
-// TODO(perkj): Remove BitrateObserver when no implementations use it.
 class BitrateObserver {
   // Observer class for bitrate changes announced due to change in bandwidth
   // estimate or due to bitrate allocation changes. Fraction loss and rtt is
@@ -49,15 +46,10 @@
   // estimation and divide the available bitrate between all its registered
   // BitrateObservers.
  public:
-  static const int kDefaultStartBitratebps = 300000;
+  static const int kDefaultStartBitrateKbps = 300;
 
-  // Deprecated:
-  // TODO(perkj): BitrateObserver has been deprecated and is not used in WebRTC.
-  // Remove this method once other other projects does not use it.
   static BitrateController* CreateBitrateController(Clock* clock,
                                                     BitrateObserver* observer);
-  static BitrateController* CreateBitrateController(Clock* clock);
-
   virtual ~BitrateController() {}
 
   virtual RtcpBandwidthObserver* CreateRtcpBandwidthObserver() = 0;
@@ -79,10 +71,6 @@
   virtual bool AvailableBandwidth(uint32_t* bandwidth) const = 0;
 
   virtual void SetReservedBitrate(uint32_t reserved_bitrate_bps) = 0;
-
-  virtual bool GetNetworkParameters(uint32_t* bitrate,
-                                    uint8_t* fraction_loss,
-                                    int64_t* rtt) = 0;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_BITRATE_CONTROLLER_INCLUDE_BITRATE_CONTROLLER_H_