OnReceivedUplinkPacketLossFraction() receives [const rtc::Optional<float>&]

webrtc/tools/event_log_visualizer/analyzer.cc

Index: webrtc/tools/event_log_visualizer/analyzer.cc
diff --git a/webrtc/tools/event_log_visualizer/analyzer.cc b/webrtc/tools/event_log_visualizer/analyzer.cc
index fa772d705fb77cc5ebeb2e42565be8d57a7ed8d9..1a6674d914b0d4e0ca1c9ea49daff7c527bd2e2f 100644
--- a/webrtc/tools/event_log_visualizer/analyzer.cc
+++ b/webrtc/tools/event_log_visualizer/analyzer.cc
@@ -1298,8 +1298,7 @@ void EventLogAnalyzer::CreateAudioEncoderUplinkPacketLossFractionGraph(
   ProcessPoints<AudioNetworkAdaptationEvent>(
       [](const AudioNetworkAdaptationEvent& ana_event) {
         if (ana_event.config.uplink_packet_loss_fraction)
-          return rtc::Optional<float>(static_cast<float>(
-              *ana_event.config.uplink_packet_loss_fraction));
+          return ana_event.config.uplink_packet_loss_fraction;
         return rtc::Optional<float>();
       },
       audio_network_adaptation_events_, begin_time_, time_series);