Read the number of TLs for VP9 too + cleanup

webrtc/video/video_send_stream.cc

Index: webrtc/video/video_send_stream.cc
diff --git a/webrtc/video/video_send_stream.cc b/webrtc/video/video_send_stream.cc
index 16d80da649198b314ed03c1063edb7b33ab354a5..fc1484baa7c1e21a329e2caec9142a814ce54e00 100644
--- a/webrtc/video/video_send_stream.cc
+++ b/webrtc/video/video_send_stream.cc
@@ -271,6 +271,8 @@ bool VideoSendStream::ReconfigureVideoEncoder(
       }
       break;
   }
+  video_codec.disableGenericBitrateFrameDropper =
+      config.disable_generic_bitrate_frame_dropper;
 
   if (video_codec.codecType == kVideoCodecVP8) {
     video_codec.codecSpecific.VP8 = VideoEncoder::GetDefaultVp8Settings();