Read the number of TLs for VP9 too + cleanup

webrtc/modules/video_coding/main/source/video_sender.cc

Index: webrtc/modules/video_coding/main/source/video_sender.cc
diff --git a/webrtc/modules/video_coding/main/source/video_sender.cc b/webrtc/modules/video_coding/main/source/video_sender.cc
index c5317ec412bb61f4455ec656a2435e85160df1aa..a5ef22a46e41712e44f60f392579d00909e5c299 100644
--- a/webrtc/modules/video_coding/main/source/video_sender.cc
+++ b/webrtc/modules/video_coding/main/source/video_sender.cc
@@ -106,9 +106,15 @@ int32_t VideoSender::RegisterSendCodec(const VideoCodec* sendCodec,
     return VCM_CODEC_ERROR;
   }
 
-  int numLayers = (sendCodec->codecType != kVideoCodecVP8)
-                      ? 1
-                      : sendCodec->codecSpecific.VP8.numberOfTemporalLayers;
+  int numLayers;
+  if (sendCodec->codecType == kVideoCodecVP8) {
+    numLayers = sendCodec->codecSpecific.VP8.numberOfTemporalLayers;
+  } else if (sendCodec->codecType == kVideoCodecVP9) {
+    numLayers = sendCodec->codecSpecific.VP9.numberOfTemporalLayers;
+  } else {
+    numLayers = 1;
+  }
+
   // If we have screensharing and we have layers, we disable frame dropper.
   bool disable_frame_dropper =
       numLayers > 1 && sendCodec->mode == kScreensharing;