Added implementation of four functions in the BBR congestion controller.

webrtc/modules/remote_bitrate_estimator/test/packet.h

Index: webrtc/modules/remote_bitrate_estimator/test/packet.h
diff --git a/webrtc/modules/remote_bitrate_estimator/test/packet.h b/webrtc/modules/remote_bitrate_estimator/test/packet.h
index 223a50ba8fa0a413e70322b464ca73553e528609..525397c50df84c4c30ada2a814620cea8340ef76 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/packet.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/packet.h
@@ -111,20 +111,18 @@ class FeedbackPacket : public Packet {
 
 class BbrBweFeedback : public FeedbackPacket {
  public:
-  BbrBweFeedback(
-      int flow_id,
-      int64_t send_time_us,
-      int64_t latest_send_time_ms,
-      const std::vector<std::pair<uint64_t, int64_t>>& packet_feedback_vector);
+  BbrBweFeedback(int flow_id,
+                 int64_t send_time_us,
+                 int64_t latest_send_time_ms,
+                 const std::vector<uint64_t>& packet_feedback_vector);
   virtual ~BbrBweFeedback() {}
 
-  const std::vector<std::pair<uint64_t, int64_t>>& packet_feedback_vector()
-      const {
+  const std::vector<uint64_t>& packet_feedback_vector() const {
     return packet_feedback_vector_;
   }
 
  private:
-  const std::vector<std::pair<uint64_t, int64_t>> packet_feedback_vector_;
+  const std::vector<uint64_t> packet_feedback_vector_;
 };
 
 class RembFeedback : public FeedbackPacket {