Add TransportFeedback adapter, adapting remote feedback to bwe estiamtor

webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h

Index: webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h
diff --git a/webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h b/webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h
index 057dfb8e9747e57c033985a89249ce61b4176e63..f201aeb1885bc4cd137610219098da354e5c510a 100644
--- a/webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h
+++ b/webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h
@@ -19,6 +19,7 @@
 #include "webrtc/common_types.h"
 #include "webrtc/modules/interface/module.h"
 #include "webrtc/modules/interface/module_common_types.h"
+#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
@@ -58,34 +59,9 @@ struct ReceiveBandwidthEstimatorStats {
   std::vector<int64_t> recent_arrival_time_ms;
 };
 
-struct PacketInfo {
-  PacketInfo(int64_t arrival_time_ms,
-             int64_t send_time_ms,
-             uint16_t sequence_number,
-             size_t payload_size,
-             bool was_paced)
-      : arrival_time_ms(arrival_time_ms),
-        send_time_ms(send_time_ms),
-        sequence_number(sequence_number),
-        payload_size(payload_size),
-        was_paced(was_paced) {}
-  // Time corresponding to when the packet was received. Timestamped with the
-  // receiver's clock.
-  int64_t arrival_time_ms;
-  // Time corresponding to when the packet was sent, timestamped with the
-  // sender's clock.
-  int64_t send_time_ms;
-  // Packet identifier, incremented with 1 for every packet generated by the
-  // sender.
-  uint16_t sequence_number;
-  // Size of the packet excluding RTP headers.
-  size_t payload_size;
-  // True if the packet was paced out by the pacer.
-  bool was_paced;
-};
-
 class RemoteBitrateEstimator : public CallStatsObserver, public Module {
  public:
+  static const int kDefaultMinBitrateBps = 30000;
   virtual ~RemoteBitrateEstimator() {}
 
   virtual void IncomingPacketFeedbackVector(