Give FeedbackTimeout experiment the correct name.

webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.cc

Index: webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.cc
diff --git a/webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.cc b/webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.cc
index f09382bdc2e0c8d64a26d6111913cf7ac82edaf3..b3140311c42da6d3d43a23fe17286a243b128909 100644
--- a/webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.cc
+++ b/webrtc/modules/bitrate_controller/send_side_bandwidth_estimation.cc
@@ -74,7 +74,7 @@ SendSideBandwidthEstimation::SendSideBandwidthEstimation(RtcEventLog* event_log)
       event_log_(event_log),
       last_rtc_event_log_ms_(-1),
       in_timeout_experiment_(webrtc::field_trial::FindFullName(
-                                 "WebRTC-SendSideBwe") == "Enabled") {
+                                 "WebRTC-FeedbackTimeout") == "Enabled") {
   RTC_DCHECK(event_log);
 }