Added protobuf message for loss-based BWE events, and wired it up to the send side bandwidth estima…

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index f83d32050d8789d5d3e4c880505beb5d6ec533c1..39357d57df70ef3b3303ba37b093c4f476b376e2 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -168,6 +168,8 @@ Call::Call(const Call::Config& config)
       config_.bitrate_config.min_bitrate_bps,
       config_.bitrate_config.start_bitrate_bps,
       config_.bitrate_config.max_bitrate_bps);
+
+  congestion_controller_->GetBitrateController()->SetEventLog(event_log_);
 }
 
 Call::~Call() {