Derive current layer from TL frame config.

webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h

Index: webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
diff --git a/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h b/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
index cfb311d924731ce01f4bde346b96129e424340c9..cfa29116e60ce3fd1035c5d12e47cc7c47c860ea 100644
--- a/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
+++ b/webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h
@@ -35,7 +35,7 @@ class ScreenshareLayers : public TemporalLayers {
 
   // Returns the recommended VP8 encode flags needed. May refresh the decoder
   // and/or update the reference buffers.
-  TemporalReferences UpdateLayerConfig(uint32_t timestamp) override;
+  TemporalLayers::FrameConfig UpdateLayerConfig(uint32_t timestamp) override;
 
   // Update state based on new bitrate target and incoming framerate.
   // Returns the bitrate allocation for the active temporal layers.
@@ -48,12 +48,14 @@ class ScreenshareLayers : public TemporalLayers {
   bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override;
 
   void PopulateCodecSpecific(bool base_layer_sync,
+                             const TemporalLayers::FrameConfig& tl_config,
                              CodecSpecificInfoVP8* vp8_info,
                              uint32_t timestamp) override;
 
   void FrameEncoded(unsigned int size, int qp) override;
 
-  int CurrentLayerId() const override;
+  int GetTemporalLayerId(
+      const TemporalLayers::FrameConfig& tl_config) const override;
 
   uint8_t Tl0PicIdx() const override;